Frontiers of Survival: Fusion Breakthroughs, Cosmic Storms, and Space Station Tribulations | S26E124
SpaceTime with Stuart GaryOctober 16, 2023x
124
00:37:5834.81 MB

Frontiers of Survival: Fusion Breakthroughs, Cosmic Storms, and Space Station Tribulations | S26E124

The Space News Podcast. SpaceTime Series 26 Episode 124 *Australia’s first nuclear fusion reactor. The University of New South Wales is to develop Australia’s first nuclear fusion tokamak. *Earth’s largest ever solar storm  Scientists have discovered evidence of what may have been the largest ever solar storm to hit the Earth. *Russian ISS segment springs third leak in under a year The Nauka multipurpose logistics laboratory module on the Russian segment of the International Space Station has sprung a coolant leak. *The Science Report Earth has just had its hottest September on record. A new study claims eating grapes is good for eye health. Scientists discover that cats purr differently than previously thought. Skeptics guide to foolish fact checkers This week’s guests: Patrick Burr from the University of New South Wales NASA Administrator Bill Nelson Lisa Prato from the Lowell Observatory And our regular guests: Alex Zaharov-Reutt from www.techadvice.life Tim Mendham from Australian Skeptics Listen to SpaceTime on your favorite podcast app with our universal listen link: https://spacetimewithstuartgary.com/listen and access show links via https://linktr.ee/biteszHQ Additionally, listeners can support the podcast and gain access to bonus content by becoming a SpaceTime crew member through www.bitesz.supercast.com or through premium versions on Spotify and Apple Podcasts. Details on our website at https://spacetimewithstuartgary.com For more SpaceTime and show links: https://linktr.ee/biteszHQ

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00:00:00
This is SpaceTime series 26 episode 124 for broadcast on the

00:00:05
16th of October 2023. Coming up on space time, Australia's first

00:00:11
nuclear fusion reactor, Earth's largest ever solar storm. And

00:00:17
another Russian segment of the International Space Station

00:00:20
springs a leak. All that and more. Coming up on space time.

00:00:25
Welcome to space time with Stuart Gary.

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The University Of New South Wales in Sydney has announced

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plans to develop Australia's first nuclear fusion Tomac TACS

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are one of the technologies being tried around the world to

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achieve reliable, safe thermonuclear fusion for power

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generation.

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Scientists see nuclear fusion as a limitless and clean method of

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energy production using nothing but sea water that will

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ultimately help end things like global warming and climate

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change. Now, nuclear fusion is very different from nuclear

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fission used in current nuclear power stations.

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Nuclear fission is the process in which uranium atoms are split

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apart, releasing a tremendous amount of energy to heat water,

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make steam and spin turbines to generate electricity. And

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unfortunately, as a by product, it also produces high levels of

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radioactive waste. More than 10 per cent of the world's

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electricity currently comes from nuclear power plants.

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But unlike nuclear fission, nuclear fusion is clean and

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limitless. Recently, the Lawrence Livermore National

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Laboratories National Ignition Facility in California used

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ultra short bursts of 192 high powered lasers to achieve

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nuclear fusion in a hydrogen pellet. The laser produced over

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2 million joules of energy in a sudden burst lasting just a

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nanosecond.

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That's 1000 millionth of a second. This generated the

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extreme temperatures and pressures needed to trigger a

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fusion reaction by heating and compressing the hydrogen

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isotopes to just a fraction of their normal size, forcing the

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fuse together to make helium and releasing high energy neutrons

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in the sun.

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This process happens naturally where core temperatures exceed

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15 million degrees Celsius and pressures reach £3.84 trillion

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per square inch. That's 26.5 pap pascals. But duplicating these

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extreme conditions on Earth has proven to be far more difficult.

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And the process has become the holy grail of fusion research

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ever since the 19 fifties. Laser fusion ignition is one of two

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paths that physicists are following in their quest to

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achieve nuclear fusion. The other involves magnetic

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confinement fusion in which a super heap plasma is contained

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in a Taurus or donut shaped vacuum chamber ring called a

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Tomac using powerful magnets.

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The plasma is made up of heavy and super heavy isotopes of

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hydrogen known as deuterium and tritium normal hydrogen, also

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known as protium consists of just a single proton in its

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nucleus orbited by an electron geum.

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Differs in that the nucleus also contains a neutron and tritium

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has a proton and two neutrons in its nucleus. These isotopes are

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heated to between 153 100 million degrees Celsius by

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powerful electric currents within the Tomac ring. At these

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extreme temperatures, electrons are ripped off their atoms

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forming a charged plasma of hydrogen ions.

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This is where the magnets come in. They can find this highly

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charged high temperature plasma to an extremely small area

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within the ring, thereby maximizing the chance of the

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super heated ions fusing together and giving off energy.

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It also keeps this hot plasma away from the sides of the

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Taurus. Now, the heat generated through this process can be used

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to turn water into steam which spins turbines producing

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electricity. So far more than 200 experimental Toco Macs have

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been built worldwide, but today they've all consumed more energy

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than what they produce the massive international to ma

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project it.

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A the international thermonuclear experimental

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reactor is currently under construction in Southern France

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with the aim of starting operations in 2027. Meanwhile,

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physicists in Germany are using a complicated variation of the

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Token Ma known as a Stoler.

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It uses a twisting ring design with changes in geometry and

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differing magnetic fields. These control the plasma for longer

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periods of time compared to the short burst Token Macs usually

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achieve the University Of New South Wales nuclear fusion

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device will be wholly designed developed built and operated by

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students.

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The project's headed by nuclear engineering expert Patrick Burr

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and aims to have a working device operating within 2 to 3

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years. The university's Token Ma will be small just a meter by a

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meter and this early Token Ma design will potentially be

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followed by other devices also aiming to achieve nuclear fusion

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possibly using different methods such as high powered lasers.

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The program is being supported by engineering partners, Tomac

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energy and HB 11 Energy Burr says the project will be the

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first in the world where students will design, build and

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manage a fusion reactor.

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A tac is a doughnut shaped machine that contains

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effectively a vacuum but with a little bit of gas. So it's not

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complete vacuum, it's nearly a vacuum but that we put inside

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the hydrogen isotopes and then it's got three very large sets

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of magnets magnets going around the circumference magnets going

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around sort of in the other direction of the you can imagine

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and a big magnet in the middle.

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And what all those magnets do is that they spin around the atoms

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that are inside the vacuum and they spin them very, very, very

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fast until well they are ionized atoms, they've been stripped of

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the electrons and they get spun very, very quickly until the

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force that they have when they collide on one another is enough

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to overcome the natural repulsion that when two atoms

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bump against one another, they will naturally and just move on,

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they repel.

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But if you can get them to collide really, really fast,

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they will get beyond the natural repulsion and actually fuse

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together. And when that happens, you get fusion. So a is one of

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the ways in which can achieve fusion by accelerating a plasma

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or a gas of charged particles inside a vacuum chamber.

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One of those in France right now, aren't they?

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Absolutely? The iter is definitely the biggest Tucker

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that has ever been so far though. It's actually dwarfed by

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the one that will succeed, that 's called demo. So yes, there is

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an international consortium. It 's been built in France, but it

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actually involves many countries including Australia. In fact,

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everyone has been contributing to the development of that ma

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machine.

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It takes a lot of energy to run these things. But if you fuse

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enough hydrogen into helium, there's enough residual energy

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produced that there's a little bit more energy than what it

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takes to make that thing in the first place. And that's the aim

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of the Absolutely.

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And in fact, the point of it is to demonstrate that we already

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know we can get more energy out than we put in. So fusion is

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really an energy amplifier, right?

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You need a huge amount of energy to make it go, but then you get

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a bit more energy out and it is really about demonstrating the

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technologies about the magnets, about the materials, about the

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controls, the diagnostics that will allow us to control this

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for useful skills, right?

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How is the turke different from what the are doing with their

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stellar design?

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Well, a stellar is not that similar in the sense that it's

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also toroid. So it's effectively another doughnut shaped machine.

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But the difference there is that it's a very, very complicated

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twisted shape of a doughnut and the reason for that and things

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like this.

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Well, the reason is the simplest way to explain it is this that

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so it's very simple to build in principle because you've got

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early pre sets of magnets, but it's actually very difficult to

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operate because the plasma.

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So this current of fast moving atoms that they don't want to

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stay around in a nice circular shape, they will tend to try and

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escape and you're constantly controlling the currents in all

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the magnets to try to keep the plasma do what you want to do.

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Well, accelerator. On the other hand, is excruciatingly

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difficult to design because the magnets have these really

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complicated twisted shapes. But the idea is that once you've

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managed to do that, the control of the plasma is really, really

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because it naturally wants to remain where it is.

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And so you've basically moved the problem of a difficult

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control of the plasma to a problem of difficult

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construction of really tight tolerances in your magnet

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design. The concept is very similar.

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Otherwise they've recently in the United States achieved

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fusion twice now, but they're using a different system, aren't

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they? They're using one involving lasers?

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Yes, that's correct. Well, I should clarify. Actually, fusion

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has been achieved many times hundreds of times. It's really

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been achieved in the United States that you were referencing

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to the National Ignition facility. Is that twice they

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managed to get more energy out than they put in. And that's a

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big, big step forward for the fusion community.

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But you're right, they haven't done that with a to or with

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Accelerator. They've done that using lasers. Talk about getting

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more energy out. But there is a very important point there. But

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at the moment, they've only got a little bit out like a tiny,

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little bit more. The idea is that you need to get five times

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or even 10 times more energy out before it commercially viable.

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And they've got to be able to do it consistently too, don't they?

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Not just one burst? Absolutely.

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And that is the exact point that we're working on here. It's

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about working away from. Let's see, what are the conditions we

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can achieve and how good is our fusion to? How consistently can

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we do it? Can we move from milliseconds to seconds to hours

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to days? Because in order to provide electricity to the grid,

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it's no good to have energy, but only for a few seconds, you need

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to have energy for hours or days at a time.

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And there are really many, many different which you can do

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fusion. And in fact, there are some 50 plus companies in the

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world, all sort of racing to be the first one to build a

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commercial fusion reactor. And they're all pursuing very

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different technologies.

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But broadly speaking, you either use magnets or you use lasers.

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And in both cases, what you're trying to do is accelerate atoms

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fast enough that they can light together, infuse together with

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lasers. All you're doing is imparting a lot of energy to the

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atoms from all directions at the same time. And so you're

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compressing atoms together.

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And that's what the sun does naturally in its core.

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Absolutely. Except for the sun does say using gravity actually

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because it can, it's enormous.

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You guys are planning to build a Token Ma tell me about it.

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Yes. So this will be the very first to that is entirely

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designed to build and operate by students. So that's what is

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innovative about our to it will be very small scale, at least

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the first it and I say the first it situation because a key part

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of this project is that we're not going to build one and then

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that's it, we're going to use it for.

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And that's basically the history of all talks that have been

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built in history and there's been several, tens of them. But

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our goal is to build one. And as soon as we built it and show

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what it can do is start building the next one and make it better,

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faster, stronger and everything. And this iterative process of

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making our reactors keeping them quite small.

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So we can meet the rate at a rate of about one new device

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every two years. Roughly means that we can really learn very

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fast and we can really push the boundary of what is possible at

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a much faster pace. It really speeds up the learning curve.

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And by doing that, we hope to help our industry partners,

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they're aiming to build commercial fusion reactors.

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But the challenge that they have is that they have a lot of

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engineering challenges, which is a good, that's the good news,

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right? Engineering challenges is better than physics challenges.

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You know, we don't have to discover new physics. We

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understand the physics.

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We now need to just deal just in inverted commas, deal with the

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engineering challenges to make it feasible. But they've got

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lots of challenges and they have to solve all of them in order to

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have a commercial reactor. What we're going to do is in each

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iteration of the device, we're going to focus on one challenge

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and just that one single challenge and we're going to

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spend two years trying to solve that one.

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And for instance, that might be, can we push the limit of what

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the strength of the magnets that we can have on the Dr Ma? So

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that we can control a plasma with a higher density, but the

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machine doesn't want to rip itself apart because there are

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huge forces in part by the magnets.

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Or can we design materials that we stand higher temperatures

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because these reactors operate at about 100 million degrees C.

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So can we design materials that can resend those temperatures

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for long enough before we need to replace them? Those are the

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sorts of challenges that we hope to help accelerate the

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development of for our industry partners.

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And that's part of the concept of using magnets around the

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Token act to keep the plasma in the center of the doughnut

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device so that it doesn't touch the edges. Right. Absolutely

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correct.

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So in the real world, your very, very hot plasma never touches

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the edges, right? And so doesn't destroy your material and the

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plasma doesn't cool down either. So that's great.

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But in reality, it's actually very difficult to control the

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plasma and there will be occasionally and sometimes not

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so occasionally deviations from that optimal point, right. So

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you have to make engineering materials that can withstand

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those transient, those deviation from the idea of setting.

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And one great thing about our device is that once we built it,

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we're straight on moving on to the next one, which means that

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we have a device that we can use for those more destructive type

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of testing, then normally you would on a machine that has

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taken you 10 years to build and several million dollars to

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build, which is doing those tests, to understand what

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happens to the machine and to the components of the machine.

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When you have a transient in your plasma, for.

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The mantra, I keep hearing is always, it's about 10 years

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away. It's been about 10 years away for quite some time now.

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What's the horizon look like?

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Well, you see that's, you know, the joke that's been the future

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community for. But there's actually a joke about the joke.

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You know, I first heard that when I started my phd and that

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was about 15 years ago.

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And they used to say when I first heard that joke, they

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said, oh fusion is 30 years away and has always been 30 years

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away that it's kind of changed its tone and then it became 20

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years and most recently 15 and you just said 10 and guess what?

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In 15 years, the goal has moved from 30 years to 10 years. I

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think that's a successful, right?

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So, no, but jokes aside, the truth is this, the goal does not

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change if the milestone that when you will achieve future

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does not change unless you put, invest into it, right? So if you

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need 30 years of development in order to make it happen and you

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don't put money into it, it's no one's going to make that

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development and it's almost going to be 30 years away.

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What's really happened in the last 10 years and especially in

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the last five years, it's an unprecedented level of

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investment, not just from governments and national labs as

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is historic, always been the case like it is the example we

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were talking about before.

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But now there are a very large number of start up and companies

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that have found private investment to do research in

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fusion, to develop fusion machines. And I don't know much

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about private investors, but I do know that people don't put

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money into something unless they get a return in it.

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So to me, this is a strong sign that the private investment

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sector sees that this is getting close to reality and they've got

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to get a return on their money in a reasonable timescale. And

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that's really what's kick starting all this accelerated

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development of fusion.

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And we hope to be a part of that. Where are you going to

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build it, going to build UNSW Sydney in the Kensington campus?

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And once it's built, it will be open at some days of the year

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for the public to see. And we hope to also will it out some of

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the events to show the world.

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We don't have firm designs and that goes part to the core of

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what we're doing. It's going to be entirely designed and built

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for students, but we have a parameter space in which to work

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in. So we know already that it will be roughly 1 m in diameter.

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So that gives you a sense of skill, it's not going to be very

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big and that's part of the design criteria. However, that's

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the device itself, you very quickly realize that everything

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that needs to go around it from the power sources is really

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quite big.

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The power source itself might be about 10 times the size of the

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device. So that gives us a sense of scale of what we're trying to

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build a Token. That's a very good question. Thank you. Well,

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Toke is the most mature technology in terms of fusion

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energy, but by all means, we're not set to only build Tomas.

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In fact, whilst the first design will be a to ma we hope that we

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will be able to for other technologies in particular laser

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technology and laser Ballroom Proton Infusion, which is

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pioneered was actually in fact, pioneered here at UNSW and we

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are working with a Sydney based company called HP 11 and we hope

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to do some devices of that type as well.

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We are very technology agnostics and we just hope to be able to

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help the entire fusion industry, whatever flavor of reactor

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design they're planning to build.

00:17:05
That's Patrick Burr, a senior lecturer at the University Of

00:17:08
New South Wales in Sydney. And this is space time still to

00:17:13
come. Earth's largest ever solar storm and another leak in the

00:17:17
Russian segment of the International Space Station. All

00:17:21
that and more still to come on. Space time.

00:17:40
Scientists have discovered evidence of what may well be the

00:17:43
largest ever solar storm to hit planet Earth. The massive

00:17:47
geomagnetic storm was identified by a huge spike in radiocarbon

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levels 14 years ago, discovered during an analysis of

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ancient tree rings found in the French Alps, a similar solar

00:18:00
storm today would be absolutely catastrophic for our

00:18:03
technological society.

00:18:05
It would potentially cost billions wiping out

00:18:08
telecommunications and navigation systems, destroying

00:18:11
satellites causing massive electricity grid blackouts and

00:18:15
hitting astronauts with high doses of radiation. The findings

00:18:19
reported in the royal society's philosophical transactions

00:18:22
reveal new insights into the sun 's extreme weather and the risks

00:18:26
that poses for the planet.

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The authors measured radio carbon levels in ancient trees

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preserved within the eroded banks of the Dots river near gap

00:18:35
in the southern French Alps, the tree trunks which were sub

00:18:39
fossils, meaning his fossilization process has not

00:18:42
been complete, were sliced into tiny tree rings and analysis of

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these individual tree rings identified an unprecedented

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spike in radiocarbon levels occurring precisely 14 years

00:18:55
ago by comparing the radiocarbon spike with measurements of

00:18:59
beryllium chemical element found in Greenland ice cores.

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The authors proposed that the spike was caused by a massive

00:19:05
salt storm which would have ejected huge volumes of

00:19:09
energetic particles into Earth's atmosphere. The study's lead

00:19:13
author Edward Bard from the College Of France says

00:19:16
radiocarbon is constantly being produced in the upper atmosphere

00:19:19
through a chain reaction initiated by cosmic rays.

00:19:23
Recently, scientists found that extreme solar events including

00:19:27
solar flares and coronal mass ejections can also create short

00:19:31
term bursts of energetic particles which are then

00:19:34
preserved to see spikes in radio carbon production occurring over

00:19:38
the course of just a single year. The researchers say that

00:19:42
this occurrence of similar massive solar storms today would

00:19:46
be catastrophic for a modern technological society.

00:19:50
They warn that it's critical to understand the future risks of

00:19:53
events like this in order to enable better protection, build

00:19:56
resilience into communications and energy systems and shield

00:20:00
them from the potential damage. You see extreme solar storms can

00:20:04
have huge impacts on Earth.

00:20:06
A sudden flood of charged particles reaching power lines

00:20:10
will overload transformers causing them to blow. Now, sure

00:20:15
you can replace one or two transformers but having to

00:20:17
replace hundreds even thousands at one time would take years.

00:20:22
The result would mean huge widespread power blackouts

00:20:26
lasting for ages. And of course, these same solar storms will

00:20:30
also damage spacecraft affecting global communication and

00:20:33
navigation systems.

00:20:35
And that can happen in one of two ways. Either the spacecraft

00:20:38
itself can have its circuits fried or the spacecraft's life

00:20:42
could be shortened by expanding the Earth's atmosphere which

00:20:45
would cause greater atmospheric drag for an orbiting spacecraft

00:20:49
that would cause them to lose altitude, meaning more fuel

00:20:52
would have to be used in order to regain a higher orbit as far

00:20:56
as we know, nine such extreme solar storms.

00:20:59
Known as Maik events have now been identified as having

00:21:02
occurred over the past 1500 years. The most recent confirmed

00:21:07
Mallika event occurred in the year 993 with another one in the

00:21:11
year 774.

00:21:14
But this newly identified 14 year old storm is however, the

00:21:18
largest that has ever been found roughly twice the size of the

00:21:22
other two. The exact nature of these mae events remain poorly

00:21:26
understood. That's because they've never been directly

00:21:29
observed or monitored with instruments. But they highlight

00:21:33
that we still have much to learn about the behavior of the sun

00:21:36
and the dangers it poses to society on Earth.

00:21:40
We simply don't know what causes such extreme solar storms to

00:21:44
occur, how frequently they really occur. And if there's

00:21:47
anything we can do to predict them baird points out that

00:21:51
direct instrumental measurements of solar activity really only

00:21:54
began in the 17th century with the start of people cutting

00:21:58
sunspots.

00:21:59
Nowadays, of course, very detailed records are kept using

00:22:02
ground and space based observatories. However, these

00:22:06
relatively short term instrumental records are

00:22:09
insufficient for a complete understanding of the sun

00:22:12
radiocarbon measured in tree rings used alongside bum in the

00:22:16
polar ice cores, provides the best way to understand the sun's

00:22:19
behavior further back into the past.

00:22:22
Right now, the largest directly observed solar storm which

00:22:26
occurred back in 18 59 is known as the Carrington event. It

00:22:31
caused massive disruption on Earth, destroying telegraph

00:22:34
machines and creating night time aurore so bright you could read

00:22:38
a paper without turning on a light. However, the Maaki events

00:22:42
including this newly discovered 14 year old storm would have

00:22:46
been a staggering entire order of magnitude greater in size.

00:22:51
This is space time still to come. Another leak from the

00:22:56
Russian segment of the International Space Station. And

00:22:59
later in the science report, the World Meteorological

00:23:02
Organization says planet Earth's just experienced its hottest

00:23:05
September on record all that and more still to come on space

00:23:10
time.

00:23:26
The NCA multi purpose logistics laboratory module on the Russian

00:23:29
segment of the International Space Station has sprung a

00:23:32
coolant leak. It's the third leak involving a cooling system

00:23:36
aboard a Russian made spacecraft in less than a year and that's

00:23:40
raising new concerns about the reliability of Moscow's space

00:23:44
program.

00:23:45
Similar coolant leaks hit both the Soyuz MS 22 capsule in

00:23:49
December last year and the progress MS 21 cargo ship in

00:23:53
February this year. Both while they're attached to the

00:23:56
International Space Station.

00:23:59
The latest leak was discovered when flecks of frozen coolant

00:24:02
were seen spraying into space from the module's external back

00:24:06
up radiator circuit during a live feed of the Russian

00:24:09
orbital. Now collab and later confirmed in radio chatter

00:24:13
between us mission control and astronauts took more than 10

00:24:17
years longer to build than expected.

00:24:19
And after it finally reached orbit in 2021 it suffered more

00:24:23
problems. In fact, just hours after being attached to the

00:24:26
space station, its main thrusters suddenly began firing

00:24:30
all by themselves, sending the entire space station spinning

00:24:33
out of control.

00:24:35
Crews were forced to fire other opposing thrusters in order to

00:24:38
try and counter the effect of the NCA thrusters which couldn't

00:24:42
be turned off until they had exhausted their entire fuel

00:24:45
supply. As for this latest problem.

00:24:47
Well, the Russian Space Agency, Ros Kosmos says temperatures

00:24:51
aboard the space station remain normal despite the latest

00:24:54
incident, that's because the module's primary radiator

00:24:58
remained working nominally providing full cooling to the

00:25:01
module when these leaks first began occurring.

00:25:04
Ros cosmos put them down to micro meteoroid impacts but with

00:25:09
three leaks involving the same equipment that's raising real

00:25:12
concerns about the reliability of Russian manufacturing.

00:25:16
You see the coolant leaks aren't isolated incidents, air leaks,

00:25:21
venting atmosphere into space have regularly affected other

00:25:24
Russian equipment on the space station, including a leaky Soyuz

00:25:27
capsule which was docked to the orbiting outpost and several air

00:25:31
leaks in other Russian modules, some of which have been patched

00:25:34
but others are in such inaccessible areas, they can't

00:25:37
be fixed.

00:25:39
And so thanks to these Russian modules, the space station will

00:25:42
always be leaking oxygen and it 's not just leaks.

00:25:47
Back in 2018, there was a near fatal ascent board just two

00:25:51
minutes into the flight of a man Soyuz bound for the space

00:25:54
station that was eventually blamed on a strap on booster

00:25:57
being wrongly attached and consequently slamming into the

00:26:01
core stage of the Soyuz rocket.

00:26:03
Instead of flipping away, the International Space Station

00:26:07
remains one of the few areas of co-operation still going on

00:26:10
between Moscow and the West. In the wake of Russia's invasion of

00:26:13
Ukraine and the international sanctions which have been

00:26:16
imposed as a result. This is space time and time now to take

00:26:37
a brief look at some of the other stories making news in

00:26:39
science.

00:26:39
This week with the science report, the World Meteorological

00:26:44
Organization says planet Earth has just experienced its hottest

00:26:47
September on record and by a record breaking margin,

00:26:51
September had an average surface temperature of 16.38 °C.

00:26:57
That's a full half degree above the temperature for the previous

00:27:00
warmest September back in 2020 about 1.75 °C warmer for the

00:27:05
month of September compared to pre industrial references from

00:27:09
the 18 fifties to the 19 hundreds.

00:27:12
According to the World Meteorological Organization, the

00:27:15
current extended streak of high land and sea surface

00:27:18
temperatures is an ominous signal about the speed with

00:27:21
which greenhouse gasses are changing our climate. They say

00:27:25
2023 is now on track to be the warmest year on record.

00:27:30
A new study claims eating grapes could be good for eye health.

00:27:35
The findings reported in the journal food and function,

00:27:38
examine the impact of regular grape consumption on macular

00:27:41
pigment accumulation and other biomarkers of eye health

00:27:45
statistics shows us that an aging population has a higher

00:27:49
risk of eye disease and vision problems.

00:27:52
Key risk factors for eye disease include oxidative stress and

00:27:56
high levels of ocular advanced gly and products. The 16 week

00:28:01
study involved 34 people consuming either 1.5 cups of

00:28:05
grapes per day or a placebo. And the grape eaters showed a

00:28:09
significant increase in macular pigment, optical density plasma

00:28:13
antioxidant capacity and total phenolic content.

00:28:17
Compared to those in the placebo. Those who didn't

00:28:20
consume grapes also saw a significant increase in harmful

00:28:23
advanced end products as measured in the skin. The study

00:28:27
is the first to show that grape consumption beneficially impacts

00:28:31
our health in humans.

00:28:34
A new study has found that cats purr differently to what was

00:28:37
previously thought cats are vocal creatures. They meow, they

00:28:42
squeak, they screech and they purr from a voice production

00:28:46
point of view, the meows squeaks and Screeches aren't

00:28:50
particularly special.

00:28:51
Their sounds generated by the cat's lyrics of voice box, just

00:28:55
like the vocalization in humans and many other mammals. In

00:28:58
contrast, a cat's purr was long believed to be exceptional.

00:29:03
Research.

00:29:04
Dating back half a century suggested that the ps were being

00:29:07
produced by a special mechanism through the cyclic contraction

00:29:10
and relaxation of muscles in the vocal folds within the larynx,

00:29:14
thereby requiring constant neural input and control from

00:29:17
the brain.

00:29:19
However, a new study by the University Of Vienna now

00:29:22
demonstrates that these cyclic muscle contractions are not

00:29:25
needed to generate cat purrs data from a controlled

00:29:29
laboratory experiment shows that the domestic cats lyrics can

00:29:32
produce impressively low pitched sounds, purring frequencies

00:29:36
without any cyclic neural input or repetitive muscle

00:29:39
contractions being needed.

00:29:41
They say the observed sound production mechanism is actually

00:29:44
strikingly similar to human creaky voice.

00:29:48
Back in May last year, we ran a scientifically accurate story in

00:29:52
our Australian Skeptics report exposing a pseudoscientific scam

00:29:56
by anti vaxxers falsely claiming that they can remove vaccines

00:30:00
from the bodies of people who were vaccinated, but later

00:30:03
change their minds. In other words, they claim they could de

00:30:07
vaccinate people. Well, we cried bull dust on that.

00:30:11
However, last month, fact checkers from YouTube decided to

00:30:14
remove the story wrongly claiming that it was spreading

00:30:17
medical misinformation and was in breach of their community

00:30:20
guidelines because our story is medically and scientifically

00:30:25
accurate. We stand by it and we regard this as a case of putting

00:30:29
truth to power. We say YouTube's so called fact checkers are

00:30:34
wrong in fact and so should be permanently removed from their

00:30:37
jobs.

00:30:38
We asked YouTube to appear on our show to explain their

00:30:41
decision so we can better understand their reasoning and

00:30:44
exactly what they're claiming with medical misinformation.

00:30:48
See, we found no misinformation and none of the medical experts

00:30:51
we consulted, found any misinformation either but

00:30:55
surprise, surprise YouTube have declined. Luckily, Tim Mendham

00:30:59
from Australian Skeptics who was part of that original story

00:31:03
wasn't so reticent.

00:31:04
You wonder if they were objecting to it because it

00:31:07
contained medical misinformation regardless of that. We were

00:31:10
actually criticizing it. So, because it was in there, they

00:31:12
then decided to ban it.

00:31:13
It's like if you're giving a speech and you quote a out and

00:31:17
out neo nazi or racist or something as a five words, the

00:31:20
start of your speech, the whole speech gets scrubbed. But I know

00:31:22
if that was the case, you don't get a chance to argue back.

00:31:25
Do you? Firstly, what they said wasn't a fact because there was

00:31:28
nothing wrong in our story. Our story was stating a scientific

00:31:32
fact that you cannot de vaccinate someone who has been

00:31:34
vaccinated because that's not how vaccines work. They don't

00:31:37
stay in the bloodstream for 1000 years.

00:31:39
They do what they're supposed to do, then they die and disappear.

00:31:42
That was what we were saying in the story. And yet these fact

00:31:45
checkers or in this case, fact fiction were at odds with that

00:31:49
and they seemed most upset when we challenged them. How dare we

00:31:52
challenge them.

00:31:52
We originally got this story from the conversation, which is

00:31:56
a series of articles regularly published from academics around

00:31:59
the world. It's a good source of short articles about 900 words.

00:32:04
I know exactly because I copied some of the Frown magazine which

00:32:06
we're allowed to do and they publish a lot of these things.

00:32:08
If you just go to the conversation and look it up,

00:32:11
then you'll find a lot of articles on a whole range of

00:32:13
different topics, some of which I disagree with. A lot of them

00:32:15
are fine.

00:32:15
This was a story called No, you cannot de vaccinate yourself.

00:32:19
And it specifically referred to some treatments that were being

00:32:22
suggested including snake venom kits and cupping bleach as well.

00:32:27
Having a bath in bleach. The snake venom kits are notoriously

00:32:31
poor at withdrawing snake venom and that's when you use them

00:32:34
straight away.

00:32:34
Someone suggested that their effectiveness of removing venom,

00:32:37
they get about 0.04 per cent of the venom out. And at the same

00:32:41
time, they probably cause more damage to the soft tissue around

00:32:43
where you're applying it than just leaving it there.

00:32:46
And then there's the cupping, which is the little glass bowls,

00:32:48
you heat up the air inside it with a match or a paper or

00:32:51
something and then you and you suck the poison out and often

00:32:54
the sucking just goes straight onto the skin.

00:32:55
In this case, they're talking about putting a little cut in

00:32:57
the skin and then putting the ball on top of it to draw out

00:33:00
the nastiness through the cut. This is probably dangerous

00:33:03
because you're going to damage the tissue around where the cut

00:33:06
is.

00:33:06
And in any case that would only affect things on the resurface

00:33:08
or just below the surface of the skin, it's not going to go deep

00:33:11
into your body and remove a vaccine, which as you say has

00:33:15
probably by that stage, sort of passed through, pass through

00:33:17
everything and then it's sort of dissipating as for recommending

00:33:19
bathing in bleach or baking soda or bathing in bleach doesn't

00:33:23
sound like a good idea to me.

00:33:25
And I don't know how they're supposed to get the vaccine out.

00:33:27
So, anti vaccine movements think up any excuse they can to help

00:33:32
their clientele and these things just didn't work for various

00:33:35
reasons.

00:33:35
One that's not how you get rid of vaccines. You can't get rid

00:33:38
of once it's in. And these technologies don't work in any

00:33:41
case whether it's the vaccines or not. So it's surprising that

00:33:44
YouTube would ban that story.

00:33:46
I occasionally get banned on Tumblr because they say my

00:33:50
images are pornographic. They're actually images of planets and

00:33:53
things like this. The computer sees a certain color and it

00:33:58
thinks, oh, this must be a naked.

00:33:59
Lady and here's the word Venus or uranus even worse.

00:34:05
So it's a sad situation where someone can complain and

00:34:08
presumably this was someone who 's supporting the vaccine

00:34:11
removal, complains about a story and it just gets taken down.

00:34:14
That's a bit sort of severe. And then we.

00:34:16
Challenged it and the YouTube Fact Checkers and I use that

00:34:20
term very loosely because they're not checking facts.

00:34:22
They're obviously using their own opinions, either they didn't

00:34:25
understand the article because they're not very bright or

00:34:28
alternatively, they did understand the article and

00:34:30
they're actually in support of the idea of these de vaccination

00:34:35
things, which is scientifically unsound and medically

00:34:38
ridiculous.

00:34:39
But nevertheless, that's what they did. And I thought it was

00:34:42
important that you a chance to rebuff their claims and we'll

00:34:47
get this on air before they decide to fact check this and

00:34:49
ban this as well. Which is probably what they'll do if they

00:34:51
follow a course.

00:34:52
It could be a third reason, of course is that there's so much

00:34:54
garbage on YouTube that they're sort of like the clerk in the

00:34:57
office, stamp, stamp, stamp, stamp, stamp on and let God sort

00:35:01
them out in heaven. Yeah, in a way. Yeah. And just because they

00:35:04
just don't have time someone complains about something.

00:35:06
Oh yeah, I approve that bang bang bang. Then I fact check,

00:35:08
they're not even checking perhaps. And of course, as soon

00:35:10
as they hear that they'll be wiped again. But, you know, I

00:35:14
mean, they either don't know something or they're sympathetic

00:35:17
or they just don't have time to.

00:35:19
Know something, then they shouldn't be making a judgment.

00:35:21
If they're sympathetic, then they shouldn't be making a

00:35:23
judgment. And if they don't have time to check, guess what, they

00:35:26
shouldn't be making a judgment.

00:35:29
So YouTube the ball's in your court to all the social media,

00:35:33
social media is so rife with phony fact checkers, phony,

00:35:37
phony stuff and then phony fact checking.

00:35:39
It was Mehta who admitted that fact checking is simply an

00:35:44
opinion. Well, they admitted, they admitted that in court that

00:35:48
fact checking is simply opinion.

00:35:50
And as we always say, do your own research.

00:35:52
Exactly. Best thing to do. It's what we do. That's Tim Menem

00:35:56
from Australian Skeptics.

00:36:13
And that's the show for now. SpaceTime is available every

00:36:17
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