Lunar Oasis: ESA Plans a Moon Base for Long-Term Science
SpaceTime with Stuart GaryOctober 30, 2026x
130
00:25:1223.13 MB

Lunar Oasis: ESA Plans a Moon Base for Long-Term Science

Friday SpaceTime 20261030 Series 29 Episode 130 Europe’s plans for an OASIS on the Moon The European Space Agency is looking at developing its own moon base facility that would supply energy, communications, data handling and logistics on the lunar surface. Should you move to a new neighbourhood on the Moon? A new study claims a self-sustaining' city on the Moon would likely fail after about a decade. Neutrinos holding clues to the universe’s biggest secrets Two new experiments involving ghostly particles called neutrinos could provide science with new clues about the evolution of the early universe. The Science Report Kids from socioeconomically disadvantaged families more likely have Autism Spectrum Disorder. A new study warns the many of the world’s major cities are sinking. New insights that could help mitigate the fast-rising climate impact of Lithium-ion Batteries. Claims a man laid to rest in a Roman sarcophagus in Westminster Abbey isn’t who he should be. Skeptics guide to the triggers for seeing ghosts.   Our Guests This Week Dr Sara Webb from Swinburne University Dr Thomas Watters from the Smithsonian's National Air and Space Museum Dr. Don Lincoln from Fermilab Our regular guests: Alex Zaharov-Reutt from techadvice.life Tim Mendham from Australian Skeptics 🌏 Get Our Exclusive NordVPN deal here ➼ www.bitesz.com/nordvpn . The discounts and bonuses are incredible! And it’s risk-free with Nord’s 30-day money-back guarantee! ✌ If you’d like to support the podcast and gain access to bonus content by becoming a SpaceTime crew member, you can do just that through The Big Bang editions on Patreon, Spotify and Apple Podcasts. Details on the Support page on our website https://www.bitesz.com/show/spacetime/support/
WEBVTT 0 00:00:00.000 --> 00:00:02.424 Stuart Gary: This is space time series 29 episode 1 00:00:02.536 --> 00:00:05.346 130 for broadcast on 30 October 2 00:00:05.480 --> 00:00:08.320 2026. Coming up on Space Time, 3 00:00:08.880 --> 00:00:11.440 Europe's plans for an OASIS on the Moon. 4 00:00:12.000 --> 00:00:14.040 When they do start building cities on the 5 00:00:14.040 --> 00:00:16.320 moon, should you move there, we'll take a 6 00:00:16.320 --> 00:00:18.880 look at the issues and neutrinos 7 00:00:19.040 --> 00:00:21.320 holding clues to some of the universe's 8 00:00:21.320 --> 00:00:24.000 biggest secrets. All that and more 9 00:00:24.080 --> 00:00:26.320 coming up on, um, Space Time. 10 00:00:27.680 --> 00:00:30.480 Stuart Gary: Welcome to Space Time with Stuart 11 00:00:30.480 --> 00:00:30.800 G. 12 00:00:46.940 --> 00:00:48.820 Stuart Gary: The European Space Agency is looking at 13 00:00:48.820 --> 00:00:51.220 developing its own moon base, a facility that 14 00:00:51.220 --> 00:00:53.340 would supply energy, communications, data 15 00:00:53.340 --> 00:00:55.900 handling and logistics on the lunar surface. 16 00:00:56.380 --> 00:00:58.420 The Outpost for Advanced Scientific 17 00:00:58.420 --> 00:01:00.940 Investigation Station, or oasis, could 18 00:01:00.940 --> 00:01:02.820 provide scientists with an integrated 19 00:01:02.820 --> 00:01:05.400 infrastructure designed to survive the long 20 00:01:05.400 --> 00:01:07.800 cold 15 Earth Day lunar nights. 21 00:01:08.120 --> 00:01:10.880 ESUS says the prolonged days of darkness and 22 00:01:10.880 --> 00:01:13.040 plummeting temperatures can severely damage 23 00:01:13.040 --> 00:01:15.280 electrical equipment without power or thermal 24 00:01:15.280 --> 00:01:18.280 protection to ride out the darkness. OASIS 25 00:01:18.280 --> 00:01:20.200 would replace the need for long duration 26 00:01:20.200 --> 00:01:22.520 payloads carrying their own complex systems 27 00:01:22.520 --> 00:01:24.960 for power and communications. It would 28 00:01:24.960 --> 00:01:27.120 collect solar energy during the lunar day, 29 00:01:27.120 --> 00:01:29.600 producing at least 75 watts of continuous 30 00:01:29.600 --> 00:01:32.200 power during daylight and 15 watts from banks 31 00:01:32.200 --> 00:01:34.160 of batteries during the lunar night. Along 32 00:01:34.160 --> 00:01:36.180 with communications, data hack handling and 33 00:01:36.180 --> 00:01:38.980 data storage. Detachable harness cable 34 00:01:38.980 --> 00:01:41.460 connections would feed payloads mounted on a 35 00:01:41.460 --> 00:01:43.380 lunar lander, as well as three separate 36 00:01:43.380 --> 00:01:45.580 deployable harnesses for payloads on the 37 00:01:45.580 --> 00:01:48.460 lunar surface. Scientists would simply plug 38 00:01:48.460 --> 00:01:50.660 their experiments into Oasis, rather than 39 00:01:50.660 --> 00:01:52.980 each experiment needing its own life support 40 00:01:53.060 --> 00:01:56.060 system to survive the long night. This would 41 00:01:56.060 --> 00:01:57.980 allow scientific instruments to continue 42 00:01:57.980 --> 00:02:00.460 operating for years instead of just a single 43 00:02:00.460 --> 00:02:03.040 lunar day. Oasis could also include 44 00:02:03.120 --> 00:02:05.480 parking bays. Lunar rovers could be stored 45 00:02:05.480 --> 00:02:08.360 and recharged. And ESA's 46 00:02:08.360 --> 00:02:11.120 plans for the moon don't end there. They're 47 00:02:11.120 --> 00:02:13.000 also developing their own lunar lander called 48 00:02:13.000 --> 00:02:15.400 Argonaut, which would carry 1,500 kilogrammes 49 00:02:15.400 --> 00:02:17.719 of payload to the lunar south pole using the 50 00:02:17.719 --> 00:02:20.440 Ariane 64 booster. Italy's 51 00:02:20.440 --> 00:02:22.680 Thales Alenius Space is already building the 52 00:02:22.680 --> 00:02:25.200 lunar descent element. Current 53 00:02:25.200 --> 00:02:27.600 plans call for the first mission, Argonaut 1 54 00:02:27.600 --> 00:02:29.880 to launch by the end of 2030, with follow up 55 00:02:29.880 --> 00:02:32.080 UH missions roughly every two to three years. 56 00:02:33.370 --> 00:02:35.330 ESA is also developing its own constellation 57 00:02:35.330 --> 00:02:37.330 of lunar communications and navigation 58 00:02:37.330 --> 00:02:39.450 satellites called Project Moonlight. 59 00:02:39.770 --> 00:02:41.810 Moonlight would include one for high rate 60 00:02:41.810 --> 00:02:43.770 data communications, with the other four 61 00:02:43.770 --> 00:02:46.410 being for navigation. The first would launch 62 00:02:46.410 --> 00:02:48.970 in 2028 and the four constellations should be 63 00:02:48.970 --> 00:02:51.770 up and running by 2030. This is 64 00:02:51.770 --> 00:02:54.250 space time still to come. 65 00:02:54.650 --> 00:02:56.810 When they do start building cities on the 66 00:02:56.810 --> 00:02:58.990 moon, should you move there, we'll take a 67 00:02:58.990 --> 00:03:01.630 look at the issues and neutrinos 68 00:03:01.790 --> 00:03:04.230 holding clues to the universe's biggest 69 00:03:04.230 --> 00:03:06.470 secrets. All that, and, uh, more still to 70 00:03:06.470 --> 00:03:08.190 come on spacetime. 71 00:03:24.040 --> 00:03:26.520 A new study warns that a self sustaining city 72 00:03:26.520 --> 00:03:29.120 on the moon Would likely fail after around a 73 00:03:29.120 --> 00:03:32.040 decade, with billionaires turning their focus 74 00:03:32.040 --> 00:03:34.360 to space. In recent years, two researchers 75 00:03:34.360 --> 00:03:36.640 have looked at how a proposed village or even 76 00:03:36.640 --> 00:03:38.920 a city on the moon would work, and whether 77 00:03:38.920 --> 00:03:40.880 there'd be enough natural resources there to 78 00:03:40.880 --> 00:03:43.000 sustain communities without having to bring 79 00:03:43.000 --> 00:03:45.920 water and power from earth. The authors found 80 00:03:45.920 --> 00:03:47.840 that while access to sunlight Makes 81 00:03:47.840 --> 00:03:49.640 sustainable power generation possible, 82 00:03:49.720 --> 00:03:51.720 there's only a finite amount of water 83 00:03:51.720 --> 00:03:54.070 available, which means a small city Would 84 00:03:54.070 --> 00:03:56.110 likely run out of water after about a decade 85 00:03:56.110 --> 00:03:58.030 or so, Even if they were recycling their 86 00:03:58.030 --> 00:03:59.990 water as efficiently as on the international 87 00:04:00.070 --> 00:04:02.670 space station. The research shows that 88 00:04:02.670 --> 00:04:05.110 without recycling, A city of, say, a million 89 00:04:05.110 --> 00:04:07.590 people Would exhaust the entire estimated 90 00:04:07.590 --> 00:04:09.910 lunar water supply within about two years. 91 00:04:10.550 --> 00:04:13.510 And with extreme 98% water recycling, which 92 00:04:13.510 --> 00:04:14.670 is similar to what happens on the 93 00:04:14.670 --> 00:04:16.590 international space station, the supply would 94 00:04:16.590 --> 00:04:19.040 only last roughly 100 years. And however, 95 00:04:19.200 --> 00:04:21.520 lower realistic estimates of lunar water 96 00:04:21.600 --> 00:04:23.840 Means even a small city could run out within 97 00:04:23.840 --> 00:04:26.450 a decade. The alternative would be a smaller, 98 00:04:26.450 --> 00:04:28.840 uh, moon village of about 1,000 people, which 99 00:04:28.840 --> 00:04:30.720 is comparable with research stations in 100 00:04:30.720 --> 00:04:33.400 Antarctica. The findings, reported in the 101 00:04:33.400 --> 00:04:35.520 journal frontiers in space technologies, 102 00:04:35.680 --> 00:04:38.000 Found that a smaller village or town of no 103 00:04:38.000 --> 00:04:39.720 more than a thousand people could be 104 00:04:39.720 --> 00:04:42.080 sustainable for centuries with carefree water 105 00:04:42.080 --> 00:04:44.480 use. This is space time 106 00:04:45.180 --> 00:04:48.100 still to come, neutrinos holding clues to the 107 00:04:48.100 --> 00:04:50.860 universe's biggest secrets. And later in the 108 00:04:50.860 --> 00:04:53.580 science report, A new study warns that kids 109 00:04:53.580 --> 00:04:55.980 from socioeconomically disadvantaged families 110 00:04:55.980 --> 00:04:58.380 are, uh, more likely to have autism spectrum 111 00:04:58.380 --> 00:05:00.780 disorder. All that and more still to come 112 00:05:01.340 --> 00:05:02.460 on space time, 113 00:05:10.860 --> 00:05:11.180 Foreign. 114 00:05:17.820 --> 00:05:20.060 Two new experiments Involving ghostly 115 00:05:20.060 --> 00:05:22.060 particles called neutrinos could provide 116 00:05:22.140 --> 00:05:24.660 science with new clues about the evolution of 117 00:05:24.660 --> 00:05:26.819 our universe, Especially during its early 118 00:05:26.819 --> 00:05:29.540 days. Neutrinos are, uh, weakly interacting 119 00:05:29.540 --> 00:05:31.700 elemental particles Produced in things like 120 00:05:31.700 --> 00:05:34.380 the cores of stars, in nuclear reactors, in 121 00:05:34.380 --> 00:05:36.780 supernovae, and in atomic explosions. 122 00:05:37.450 --> 00:05:39.250 They're so weakly interacting that there are 123 00:05:39.250 --> 00:05:40.770 millions of them Passing through you right 124 00:05:40.770 --> 00:05:43.330 now. They're called neutrinos because they 125 00:05:43.330 --> 00:05:46.050 have no electric charge, Only half spin, 126 00:05:46.050 --> 00:05:48.450 and almost no mass. That means they can 127 00:05:48.450 --> 00:05:50.250 travel at close to the speed of light. 128 00:05:50.650 --> 00:05:52.890 They're the most common particle with mass in 129 00:05:52.890 --> 00:05:55.330 the universe. Only the massless photon is 130 00:05:55.330 --> 00:05:58.010 more numerous. Neutrinos come in three 131 00:05:58.010 --> 00:06:00.650 basic types known as flavours. Electron, 132 00:06:00.650 --> 00:06:03.290 muon, and tau, each with its own antimatter 133 00:06:03.290 --> 00:06:05.660 counterpart. But one of the strangest 134 00:06:05.660 --> 00:06:07.780 qualities of these already strange elemental 135 00:06:07.780 --> 00:06:10.020 particles Is their ability to oscillate 136 00:06:10.020 --> 00:06:12.860 between flavours. So a neutrino which 137 00:06:12.860 --> 00:06:15.100 may have started its life in the sun's core 138 00:06:15.100 --> 00:06:17.540 as, say, a muon neutrino, could arrive at a 139 00:06:17.540 --> 00:06:19.820 detector on Earth as an electron or tau 140 00:06:19.820 --> 00:06:22.620 neutrino. And because they travel unhindered 141 00:06:22.620 --> 00:06:24.420 across the cosmos, ultra high energy 142 00:06:24.420 --> 00:06:26.980 neutrinos give astronomers an unabsorbed 143 00:06:26.980 --> 00:06:29.700 direct window into high energy cosmic events 144 00:06:29.700 --> 00:06:31.740 like supernovae and black holes. 145 00:06:32.970 --> 00:06:35.610 Quantum models suggest that heavy decoupled 146 00:06:35.610 --> 00:06:38.210 neutrinos from the early universe may help 147 00:06:38.210 --> 00:06:40.850 explain why antimatter disappeared after the 148 00:06:40.850 --> 00:06:43.810 Big Bang, leaving behind a universe made 149 00:06:43.810 --> 00:06:46.450 mostly of normal matter. One of the study's 150 00:06:46.450 --> 00:06:48.770 authors, Zoya Villari from Ohio State 151 00:06:48.770 --> 00:06:51.050 University and the NUMMI Off Axis V 152 00:06:51.050 --> 00:06:53.050 appearance or NOVA experiment says 153 00:06:53.050 --> 00:06:55.250 understanding neutrinos can answer key 154 00:06:55.250 --> 00:06:57.090 questions about the evolution of the 155 00:06:57.090 --> 00:06:59.920 universe. In an effort to better understand 156 00:07:00.160 --> 00:07:02.520 the shape shifting behaviour of neutrino 157 00:07:02.520 --> 00:07:04.440 oscillation, the NOVA experiment in the 158 00:07:04.440 --> 00:07:06.800 United States, together with the T2K 159 00:07:06.800 --> 00:07:09.400 experiment in Japan, have combined forces to 160 00:07:09.400 --> 00:07:11.720 shoot beams of neutrino particles over 161 00:07:11.720 --> 00:07:14.440 hundreds of kilometres, measuring how their 162 00:07:14.440 --> 00:07:16.800 flavours change throughout their journey. 163 00:07:17.280 --> 00:07:19.200 Despite having similar goals, the two 164 00:07:19.200 --> 00:07:21.300 experiments used very different neutrino uh 165 00:07:21.360 --> 00:07:23.440 energies and they studied the oscillations 166 00:07:23.440 --> 00:07:26.430 over different distances. NOVA sent a beam 167 00:07:26.430 --> 00:07:28.590 of muon neutrinos from the US Department of 168 00:07:28.590 --> 00:07:30.470 Energy's Fermi National Accelerator 169 00:07:30.470 --> 00:07:32.790 Laboratory Fermilab near Chicago to a 170 00:07:32.790 --> 00:07:35.230 detector in Ash River, Minnesota. And the 171 00:07:35.230 --> 00:07:37.630 T2K experiment sent their muon 172 00:07:37.630 --> 00:07:40.190 neutrinos from the east coast of Japan across 173 00:07:40.190 --> 00:07:42.350 the country to a detector in the mountains of 174 00:07:42.350 --> 00:07:45.190 western Japan. Valeri says 175 00:07:45.190 --> 00:07:47.110 while both groups goals were the same, 176 00:07:47.190 --> 00:07:49.430 differences in experiment design adds more 177 00:07:49.430 --> 00:07:51.390 information when the data is all pooled 178 00:07:51.390 --> 00:07:54.340 together. While this new study, reported 179 00:07:54.340 --> 00:07:56.060 in the journal Nature, builds on previous 180 00:07:56.060 --> 00:07:57.780 work that found tiny but still very 181 00:07:57.780 --> 00:07:59.780 consequential differences in neutrino mass 182 00:07:59.780 --> 00:08:01.700 for each type, researchers are looking for 183 00:08:01.700 --> 00:08:04.100 deeper hints that neutrinos operate outside 184 00:08:04.260 --> 00:08:06.340 the standard laws of particle physics. 185 00:08:06.820 --> 00:08:09.260 One such question is whether neutrinos and 186 00:08:09.260 --> 00:08:10.940 their antimatter counterparts behave 187 00:08:10.940 --> 00:08:12.980 differently, a phenomenon called charge 188 00:08:12.980 --> 00:08:15.820 parity violation. Neutrinos are a 189 00:08:15.820 --> 00:08:18.020 fascinating if difficult to study subject, 190 00:08:18.020 --> 00:08:20.510 and this look at the history of neutrinos 191 00:08:20.510 --> 00:08:22.870 with Dr. Don Lincoln from Fermilab. 192 00:08:22.870 --> 00:08:25.550 The transcript includes various speakers, but the main i: The subatomic world is full of all sorts of 193 00:08:25.550 --> 00:08:28.030 unfamiliar particles with names like quarks, 194 00:08:28.030 --> 00:08:29.670 which is not the sound that an Australian 195 00:08:29.670 --> 00:08:32.510 duck makes to bosons, which isn't a clown 196 00:08:32.510 --> 00:08:34.549 particle. Each have their respective 197 00:08:34.549 --> 00:08:37.070 personalities and behaviours. However, one of 198 00:08:37.070 --> 00:08:38.990 the particles is particularly curious. 199 00:08:39.390 --> 00:08:41.390 This class of particles is called the 200 00:08:41.390 --> 00:08:44.190 neutrinos. Neutrinos are the 201 00:08:44.190 --> 00:08:46.310 ghosts of the subatomic world, they interact 202 00:08:46.310 --> 00:08:48.110 less than any of the other known particles, 203 00:08:48.750 --> 00:08:50.790 Even though we are constantly bombarded by 204 00:08:50.790 --> 00:08:53.230 them. In fact, something like 650 205 00:08:53.470 --> 00:08:55.390 trillion of them Are hitting you every 206 00:08:55.390 --> 00:08:57.670 second. It took 30 years to prove that they 207 00:08:57.670 --> 00:09:00.110 exist at all. So let me tell you their story. 208 00:09:01.390 --> 00:09:03.670 To start with, we need to go back to 1930, 209 00:09:03.670 --> 00:09:05.950 when they were first proposed. It turned out 210 00:09:05.950 --> 00:09:07.430 that there was a maddening little problem 211 00:09:07.430 --> 00:09:09.950 With a kind of radioactive decay called beta 212 00:09:09.950 --> 00:09:12.800 decay. Beta decay is when an 213 00:09:12.800 --> 00:09:15.120 atomic nucleus Emits an electron, and the 214 00:09:15.120 --> 00:09:17.240 nucleus changes from one element to another. 215 00:09:17.960 --> 00:09:19.840 This is kind of like the alchemist's dream of 216 00:09:19.840 --> 00:09:21.800 changing lead into gold. Although the actual 217 00:09:21.800 --> 00:09:24.400 elements were different at the time, the 218 00:09:24.400 --> 00:09:26.480 emitted electrons Were called beta particles, 219 00:09:26.480 --> 00:09:29.400 which is where the decay got its name. The 220 00:09:29.400 --> 00:09:31.080 problem was that when the energy of the 221 00:09:31.080 --> 00:09:33.560 original nucleus Was compared To the combined 222 00:09:33.560 --> 00:09:35.200 energy of the daughter nucleus and the 223 00:09:35.200 --> 00:09:38.000 electron, the books didn't balance. After 224 00:09:38.000 --> 00:09:40.120 the decay, energy was missing. 225 00:09:41.480 --> 00:09:43.840 Since one of the most dearly held ideas of 226 00:09:43.840 --> 00:09:45.720 physics Is that energy can't be created or 227 00:09:45.720 --> 00:09:48.240 destroyed, the observation of the loss of 228 00:09:48.240 --> 00:09:50.360 energy in beta decay Sends the research world 229 00:09:50.360 --> 00:09:53.000 into a tizzy. Lots of ideas were 230 00:09:53.000 --> 00:09:55.280 considered, including the possibility that 231 00:09:55.280 --> 00:09:57.120 perhaps in the quantum world, that energy 232 00:09:57.120 --> 00:10:00.080 could disappear. In 233 00:10:00.080 --> 00:10:03.000 1930, physicist Wolfgang Pauli Came up 234 00:10:03.000 --> 00:10:04.720 with the idea that the reason that the energy 235 00:10:04.720 --> 00:10:07.190 was missing Was that because there was an 236 00:10:07.190 --> 00:10:09.910 unobserved particle emitted in beta decay. 237 00:10:10.310 --> 00:10:12.190 If that was true, the unobserved particle 238 00:10:12.190 --> 00:10:14.430 could carry away the energy, and the mystery 239 00:10:14.430 --> 00:10:16.950 was explained. These particles have come to 240 00:10:16.950 --> 00:10:19.750 be called neutrinos. There are four 241 00:10:19.750 --> 00:10:22.390 known forces. Two familiar ones Called 242 00:10:22.390 --> 00:10:25.350 gravity and electromagnetism, and two ones 243 00:10:25.350 --> 00:10:26.990 that aren't familiar, Called the strong and 244 00:10:26.990 --> 00:10:29.910 weak nuclear forces. Neutrinos 245 00:10:29.910 --> 00:10:31.310 do not interact with the strong and 246 00:10:31.310 --> 00:10:33.910 electromagnetic forces. We know that because 247 00:10:33.990 --> 00:10:36.150 if they did, they'd be very easy to see. 248 00:10:36.710 --> 00:10:39.070 Neutrinos do experience the weak nuclear 249 00:10:39.070 --> 00:10:42.070 force and gravity. Of the two, the weak force 250 00:10:42.070 --> 00:10:44.910 is the stronger of the two by far. For 251 00:10:44.910 --> 00:10:47.270 all practical purposes, Neutrinos interact 252 00:10:47.270 --> 00:10:50.150 Only via the weak nuclear force, and the 253 00:10:50.150 --> 00:10:52.590 weak nuclear force is aptly named. To give 254 00:10:52.590 --> 00:10:54.430 you a sense of how weak it is, Let me give 255 00:10:54.430 --> 00:10:56.910 you an example. Neutrinos originate from 256 00:10:56.910 --> 00:10:59.190 nuclear reactions M and the biggest nuclear 257 00:10:59.190 --> 00:11:01.990 reactor around is the sun. The sun emits 258 00:11:01.990 --> 00:11:03.870 so many neutrinos that, even though that is 259 00:11:03.870 --> 00:11:06.830 about 93 million miles away, something 260 00:11:06.830 --> 00:11:09.830 like 650 trillion neutrinos from 261 00:11:09.830 --> 00:11:11.390 the sun Hit you every second. 262 00:11:12.750 --> 00:11:14.910 So suppose you wanted to shield yourself from 263 00:11:14.910 --> 00:11:17.550 that steady barrage of neutrinos. How would 264 00:11:17.550 --> 00:11:20.190 you do that? Well, if you took a huge block 265 00:11:20.190 --> 00:11:22.350 of solid lead that extended from the nearest 266 00:11:22.350 --> 00:11:24.670 star, and I'm not talking about the Sun, I'm 267 00:11:24.670 --> 00:11:26.470 talking about Alpha Centauri, which is about 268 00:11:26.470 --> 00:11:29.290 4, 5 light years away, you'd be able to block 269 00:11:29.290 --> 00:11:31.130 something like half the neutrinos from the 270 00:11:31.130 --> 00:11:34.090 Sun. If five light years of 271 00:11:34.090 --> 00:11:36.330 solid lead has such a poor shield, then there 272 00:11:36.330 --> 00:11:38.250 is no way you can stop them. Even if you use 273 00:11:38.250 --> 00:11:40.530 the entire Earth as your protection, most 274 00:11:40.530 --> 00:11:42.530 neutrinos blow right through the planet just 275 00:11:42.530 --> 00:11:45.050 like it's not even there. Neutrinos really 276 00:11:45.050 --> 00:11:46.290 don't interact very much. 277 00:11:47.890 --> 00:11:50.490 So how did we detect them? Since neutrinos 278 00:11:50.490 --> 00:11:52.770 are emitted from nuclear interactions, one 279 00:11:52.770 --> 00:11:54.810 early idea was to put a neutrino detector 280 00:11:54.810 --> 00:11:56.130 near a nuclear detonation. 281 00:11:56.610 --> 00:11:58.570 However, that idea was quickly nixed as 282 00:11:58.570 --> 00:12:01.450 being, well, unnecessarily dramatic. So no 283 00:12:01.450 --> 00:12:03.650 bomb. Instead, in 284 00:12:03.650 --> 00:12:06.170 1955, physicists put a neutrino 285 00:12:06.170 --> 00:12:08.330 detector near a nuclear power plant and 286 00:12:08.330 --> 00:12:10.850 basically turned the plant on and off, on. 287 00:12:10.850 --> 00:12:13.330 And the detector saw more neutrinos off. And 288 00:12:13.330 --> 00:12:15.730 it saw less on and off, on and off. 289 00:12:15.890 --> 00:12:17.570 That's, uh, essentially all it took. 290 00:12:19.180 --> 00:12:21.220 In the last half century and more, neutrinos 291 00:12:21.220 --> 00:12:23.060 have been studied in great detail. There is 292 00:12:23.060 --> 00:12:25.780 no longer any question of their existence. We 293 00:12:25.780 --> 00:12:27.860 have observed them from many nuclear reactors 294 00:12:27.860 --> 00:12:29.780 and can even generate beams of them and shoot 295 00:12:29.780 --> 00:12:31.780 them hundreds of miles through the Earth to 296 00:12:31.780 --> 00:12:34.260 distant detectors. We have seen neutrinos 297 00:12:34.260 --> 00:12:35.900 that were created in distant supernovae. 298 00:12:35.980 --> 00:12:38.020 We have even observed neutrinos emitted from 299 00:12:38.020 --> 00:12:39.980 the radioactive material inside the Earth. 300 00:12:40.380 --> 00:12:42.700 Neutrinos are now familiar denizens of the 301 00:12:42.700 --> 00:12:44.830 particle world. While the original idea of 302 00:12:44.830 --> 00:12:46.350 neutrinos supposed that there was only a 303 00:12:46.350 --> 00:12:48.550 single kind of neutrino, it turns out that 304 00:12:48.550 --> 00:12:50.630 there are actually three distinct variants. 305 00:12:51.350 --> 00:12:53.150 One class of neutrino is associated with 306 00:12:53.150 --> 00:12:55.310 electrons and is called the electron type 307 00:12:55.310 --> 00:12:58.030 neutrino. The other two kinds of neutrinos 308 00:12:58.030 --> 00:13:00.110 are associated with cousins of the electron, 309 00:13:00.110 --> 00:13:03.030 the muon and the tau. Accordingly, these 310 00:13:03.030 --> 00:13:05.590 other types are called muon neutrinos and tau 311 00:13:05.590 --> 00:13:08.390 neutrinos. Scientists use the lowercase 312 00:13:08.390 --> 00:13:11.090 Greek letter nuke to indicate a neutrino with 313 00:13:11.090 --> 00:13:13.170 a subscript to tell you what kind it is. 314 00:13:14.450 --> 00:13:16.490 The way scientists discovered that there were 315 00:13:16.490 --> 00:13:18.770 three different kinds of neutrinos is that 316 00:13:18.770 --> 00:13:20.930 neutrinos seem to remember their origins. 317 00:13:21.570 --> 00:13:24.450 For instance, an experiment in 1962 created 318 00:13:24.450 --> 00:13:27.370 neutrinos in tandem with a muon. If 319 00:13:27.370 --> 00:13:29.290 one of those neutrinos was then collided into 320 00:13:29.290 --> 00:13:32.090 an atomic nucleus, only muons were generated 321 00:13:32.090 --> 00:13:34.610 in the Collision never electrons and never 322 00:13:34.610 --> 00:13:37.490 tau particles. The neutrino remembered how it 323 00:13:37.490 --> 00:13:40.250 was made. This observation led to a 324 00:13:40.250 --> 00:13:42.050 Nobel Prize in 1988 325 00:13:43.250 --> 00:13:44.970 with the observation that neutrinos have 326 00:13:44.970 --> 00:13:47.130 distinct types. Scientists thought that they 327 00:13:47.130 --> 00:13:49.090 understood neutrinos reasonably well. 328 00:13:49.650 --> 00:13:51.970 However, they continued to study them. In 329 00:13:51.970 --> 00:13:54.330 1964, one scientist wanted to study 330 00:13:54.330 --> 00:13:57.130 neutrinos originated in the biggest nuclear 331 00:13:57.130 --> 00:13:58.930 reactor around the sun. 332 00:14:00.450 --> 00:14:03.370 Raymond Davis was a chemist by trade. He knew 333 00:14:03.370 --> 00:14:05.330 that neutrinos could interact with chlorine 334 00:14:05.330 --> 00:14:08.130 and make argon. He also knew that neutrinos 335 00:14:08.130 --> 00:14:10.290 interacted very weakly and he'd need a huge 336 00:14:10.290 --> 00:14:13.050 number of chlorine atoms to make it work. So 337 00:14:13.050 --> 00:14:15.050 he took a huge vat of 338 00:14:15.050 --> 00:14:17.610 perchloroethylene, which is just a scientific 339 00:14:17.610 --> 00:14:19.890 name for dry cleaning fluid. The vat 340 00:14:19.890 --> 00:14:22.690 contained 100,000 gallons of 341 00:14:22.690 --> 00:14:24.970 liquid. That's about the size of an Olympic 342 00:14:24.970 --> 00:14:27.410 sized swimming pool. He calculated that for 343 00:14:27.410 --> 00:14:29.490 every week of operation, that he could expect 344 00:14:29.490 --> 00:14:31.810 to create 10 atoms of argon. 345 00:14:32.130 --> 00:14:35.030 Yeah, you heard me right. 10 atoms. 1, 2, 346 00:14:35.091 --> 00:14:37.810 3, 4, 5, 6, 7, 8, 9, 10, 10. 347 00:14:39.010 --> 00:14:40.610 Now that number should have blown your mind. 348 00:14:40.850 --> 00:14:43.730 His vat contained about 9 million million 349 00:14:43.970 --> 00:14:46.810 million million million atoms of 350 00:14:46.810 --> 00:14:49.770 chlorine. And 10 of them should be 351 00:14:49.770 --> 00:14:52.170 converted to argon. This just sounds 352 00:14:52.170 --> 00:14:54.050 impossible. And yet it turned out that Davis 353 00:14:54.050 --> 00:14:57.000 could do just that. So what 354 00:14:57.000 --> 00:14:59.400 did he find? Well, it turns out that he 355 00:14:59.400 --> 00:15:01.640 didn't find the ten atoms he expected. He 356 00:15:01.640 --> 00:15:04.560 found only three. The easiest explanation 357 00:15:04.560 --> 00:15:06.240 was that either the prediction or the 358 00:15:06.240 --> 00:15:08.840 measurement was wrong. And yet many follow on 359 00:15:08.840 --> 00:15:10.920 experiments confirmed his results. He was 360 00:15:10.920 --> 00:15:13.040 detecting fewer neutrinos than expected. 361 00:15:13.760 --> 00:15:15.800 This came to be called the solar neutrino 362 00:15:15.800 --> 00:15:18.800 deficit. Now, uh, you should be forgiven 363 00:15:18.800 --> 00:15:21.440 if you believe that somehow the entire field 364 00:15:21.440 --> 00:15:23.170 of neutrino physics made a huge mistake. 365 00:15:23.960 --> 00:15:26.400 However, another class of experiments told a 366 00:15:26.400 --> 00:15:28.880 similar tale. Another source of 367 00:15:28.880 --> 00:15:31.400 neutrinos came from cosmic rays, which is the 368 00:15:31.400 --> 00:15:33.480 constant pelting of high energy protons from 369 00:15:33.480 --> 00:15:35.440 the deepest space slamming into the 370 00:15:35.440 --> 00:15:36.120 atmosphere. 371 00:15:36.680 --> 00:15:39.239 Because of how the cosmic rays interact, each 372 00:15:39.239 --> 00:15:41.560 electron type neutrino should be accompanied 373 00:15:41.560 --> 00:15:44.480 by two muon type neutrinos. While the 374 00:15:44.480 --> 00:15:46.240 solar neutrino deficit could have been due to 375 00:15:46.240 --> 00:15:48.480 improper measurement or calculation, it is 376 00:15:48.480 --> 00:15:50.480 very difficult to imagine how neutrinos from 377 00:15:50.480 --> 00:15:52.850 cosmic rays could occur in any, any ratio 378 00:15:52.850 --> 00:15:55.730 other than one electron type to two muon 379 00:15:55.730 --> 00:15:58.170 types. So what was measured? 380 00:15:58.730 --> 00:16:00.370 Well, different experiments observed 381 00:16:00.370 --> 00:16:02.170 different results, but it was generally true 382 00:16:02.170 --> 00:16:03.890 that there were fewer muon neutrinos than 383 00:16:03.890 --> 00:16:06.690 expected. Another mystery had appeared, this 384 00:16:06.690 --> 00:16:08.730 one called the atmospheric neutrino problem. 385 00:16:09.770 --> 00:16:12.570 In the mid to late 1950s, Italian born 386 00:16:12.570 --> 00:16:14.570 physicist Bruno Pontecorvo 387 00:16:15.050 --> 00:16:17.610 hypothesised that it would be possible for 388 00:16:17.610 --> 00:16:19.130 the different flavours of neutrinos to 389 00:16:19.130 --> 00:16:21.620 oscillate into one another. If the idea was 390 00:16:21.620 --> 00:16:23.700 true, then a bunch of electron neutrinos 391 00:16:23.700 --> 00:16:26.220 could gradually morph into muon neutrinos and 392 00:16:26.220 --> 00:16:29.020 then back again to electron neutrinos. At the 393 00:16:29.020 --> 00:16:30.940 time he came up with the idea, only one kind 394 00:16:30.940 --> 00:16:33.060 of neutrino was known to exist. So his 395 00:16:33.060 --> 00:16:35.300 proposed oscillations were of neutrinos into 396 00:16:35.300 --> 00:16:37.700 their antimatter equivalents. However, 397 00:16:38.020 --> 00:16:39.740 we now know that the right way to think about 398 00:16:39.740 --> 00:16:41.540 neutrino oscillations is between the three 399 00:16:41.540 --> 00:16:44.340 distinct types. The 400 00:16:44.340 --> 00:16:46.020 first compelling evidence for neutrino 401 00:16:46.020 --> 00:16:48.930 oscillations came in 1998 using the Super 402 00:16:48.930 --> 00:16:50.970 Kamiokande experiment in Japan. 403 00:16:51.690 --> 00:16:54.170 This detector is a huge underground cavern 404 00:16:54.170 --> 00:16:56.930 filled with 50,000 tons of 405 00:16:56.930 --> 00:16:58.970 water surrounded by detectors called 406 00:16:58.970 --> 00:17:01.730 phototubes. Rare neutrinos would 407 00:17:01.730 --> 00:17:03.410 interact in the water and give off a blink of 408 00:17:03.410 --> 00:17:05.570 light. Using that blink of light, you could 409 00:17:05.570 --> 00:17:07.450 identify the trajectory of the neutrino 410 00:17:08.650 --> 00:17:10.850 by separating it out. Neutrinos created the 411 00:17:10.850 --> 00:17:13.530 atmosphere directly above, which was about 12 412 00:17:13.530 --> 00:17:15.780 miles away, from neutrinos created on the 413 00:17:15.780 --> 00:17:17.940 other side of the Earth, which was about 414 00:17:17.940 --> 00:17:19.140 8,000 miles away. 415 00:17:19.140 --> 00:17:21.500 They proved that it was the neutrinos that 416 00:17:21.500 --> 00:17:23.420 travelled a large distance that had changed 417 00:17:23.420 --> 00:17:26.380 their identity most. The snow experiment 418 00:17:26.380 --> 00:17:29.180 in a mine deep under Sudbury, Ontario, 419 00:17:29.260 --> 00:17:31.380 clinched it. Neutrinos were changing their 420 00:17:31.380 --> 00:17:34.140 identity. In the past decade, 421 00:17:34.140 --> 00:17:35.860 scientists have studied neutrino oscillation 422 00:17:35.860 --> 00:17:37.780 using beams of neutrinos made at particle 423 00:17:37.780 --> 00:17:39.940 physics laboratories. The Fermilab 424 00:17:39.940 --> 00:17:42.090 accelerator near Chicago, the CERN 425 00:17:42.090 --> 00:17:44.450 accelerator near Geneva, Switzerland, and the 426 00:17:44.450 --> 00:17:47.130 KEK accelerator in Japan all fire 427 00:17:47.130 --> 00:17:49.050 beams of neutrinos through the Earth to 428 00:17:49.050 --> 00:17:50.770 targets hundreds of miles away. 429 00:17:51.250 --> 00:17:53.050 These experiments have made tremendous 430 00:17:53.050 --> 00:17:55.210 headway in understanding the phenomenon of 431 00:17:55.210 --> 00:17:58.170 neutrino oscillation. However, there remain 432 00:17:58.170 --> 00:18:00.570 significant questions in the details of 433 00:18:00.570 --> 00:18:01.570 neutrino oscillations. 434 00:18:01.650 --> 00:18:03.490 Stuart Gary: And in that report from the United States 435 00:18:03.490 --> 00:18:05.050 Department of Energy's Fermi National 436 00:18:05.050 --> 00:18:07.330 Accelerator, we heard from Dr. Don Lincoln 437 00:18:07.510 --> 00:18:10.390 from Fermilab. This is space, time. 438 00:18:25.350 --> 00:18:27.390 And time. Now to take another brief look at 439 00:18:27.390 --> 00:18:28.910 some of the other stories making news in 440 00:18:28.910 --> 00:18:31.870 science this week with the Science report. A 441 00:18:31.870 --> 00:18:34.310 new study claims kids from socioeconomically 442 00:18:34.310 --> 00:18:36.790 disadvantaged and immigrant families are more 443 00:18:36.790 --> 00:18:39.190 likely to be diagnosed with autism spectrum 444 00:18:39.330 --> 00:18:41.650 disorder. The findings reported in the 445 00:18:41.650 --> 00:18:43.570 Journal of the American Medical association 446 00:18:43.650 --> 00:18:45.570 are, uh, based on the Canadian study of over 447 00:18:45.570 --> 00:18:47.730 2.3 million children born between 448 00:18:47.730 --> 00:18:50.490 2002 and 2020. The 449 00:18:50.490 --> 00:18:52.450 authors found the rates of autism were 450 00:18:52.450 --> 00:18:53.850 highest in kids from the most 451 00:18:53.850 --> 00:18:56.050 socioeconomically disadvantaged, lowest 452 00:18:56.050 --> 00:18:58.210 income neighbourhoods and born to immigrant 453 00:18:58.210 --> 00:19:00.610 mothers, and these differences worsened over 454 00:19:00.610 --> 00:19:03.490 time. Kids from these areas were also more 455 00:19:03.490 --> 00:19:05.410 likely to have been exposed to diabetes 456 00:19:05.410 --> 00:19:07.370 during their mother's pregnancy, as well as 457 00:19:07.370 --> 00:19:09.250 severe pregnancy complications and 458 00:19:09.250 --> 00:19:11.590 prematurity, which the authors may have 459 00:19:11.590 --> 00:19:13.070 contributed to these differences. 460 00:19:14.910 --> 00:19:17.110 A new study warns that many of the world's 461 00:19:17.110 --> 00:19:19.830 major cities are uh, sinking. The findings 462 00:19:19.830 --> 00:19:21.830 reported in the journal Nature are based on 463 00:19:21.830 --> 00:19:23.990 high resolution satellite data collected 464 00:19:23.990 --> 00:19:26.830 between 2014 and 2023 to measure land 465 00:19:26.830 --> 00:19:29.390 movement across 465 cities in 466 00:19:29.390 --> 00:19:32.390 107 countries. The authors found that 467 00:19:32.390 --> 00:19:35.190 parts of Mexico City, Bandung in Indonesia 468 00:19:35.190 --> 00:19:37.670 and Isfahan in Iran were experiencing the 469 00:19:37.670 --> 00:19:40.320 most sinking. Their authors also looked at 470 00:19:40.320 --> 00:19:42.360 multiple cities across Australia, including 471 00:19:42.440 --> 00:19:44.400 Sydney, Adelaide, Brisbane, Melbourne, 472 00:19:44.400 --> 00:19:46.320 Newcastle and Perth, but found none of the 473 00:19:46.320 --> 00:19:48.480 Aussie cities came close to the likes of 474 00:19:48.480 --> 00:19:49.880 Mexico and Indonesia. 475 00:19:51.400 --> 00:19:53.760 A University of Melbourne led study has 476 00:19:53.760 --> 00:19:55.840 identified new insights and evidence that 477 00:19:55.840 --> 00:19:58.040 could help significantly mitigate the fast 478 00:19:58.040 --> 00:20:00.360 rising climate impact of lithium ion 479 00:20:00.360 --> 00:20:03.200 batteries. The study's modelling found that 480 00:20:03.200 --> 00:20:06.120 by 2050 demand for lithium ion batteries used 481 00:20:06.120 --> 00:20:08.480 in electric cars, vans, buses, trucks and 482 00:20:08.480 --> 00:20:11.020 battery energy storage systems could rise 20 483 00:20:11.020 --> 00:20:13.620 fold, leading to a tenfold increase in their 484 00:20:13.620 --> 00:20:16.620 supply chain greenhouse gas emissions. The 485 00:20:16.620 --> 00:20:18.700 author's report in the journal One Earth also 486 00:20:18.700 --> 00:20:21.300 identified ways to reduce global lithium ion 487 00:20:21.300 --> 00:20:23.620 battery emissions on um, par with the annual 488 00:20:23.620 --> 00:20:25.460 emissions of the European Union. 489 00:20:26.980 --> 00:20:29.940 A new study suggests that a man laid to rest 490 00:20:29.940 --> 00:20:32.420 in a Roman sarcophagus in Westminster Abbey 491 00:20:32.420 --> 00:20:34.580 isn't who he's supposed to be. In 492 00:20:34.580 --> 00:20:37.380 1869 a skeleton was found inside 493 00:20:37.380 --> 00:20:39.500 the limestone sarcophagus which bore an 494 00:20:39.500 --> 00:20:41.780 inscription to Valerius Amandius, a wealthy 495 00:20:41.780 --> 00:20:43.800 Briton who lived in the city around the years 496 00:20:43.800 --> 00:20:45.040 300 to 400. 497 00:20:45.600 --> 00:20:47.600 However, the lid of the sarcophagus was 498 00:20:47.600 --> 00:20:49.640 carved with a Latin cross from the 10th or 499 00:20:49.640 --> 00:20:51.840 11th century, leaving the true identity of 500 00:20:51.840 --> 00:20:54.000 the skeleton inside somewhat of a mystery 501 00:20:54.720 --> 00:20:57.040 now. A new analysis of the remains reported 502 00:20:57.120 --> 00:20:58.960 in the Journal of the British Archaeological 503 00:20:58.960 --> 00:21:01.400 association showed the deceased man was 504 00:21:01.400 --> 00:21:04.400 between 35 and 49 years old, around 505 00:21:04.400 --> 00:21:06.880 5 foot 9 inches in height, with carbon dating 506 00:21:06.880 --> 00:21:08.880 of the bones suggesting that he lived between 507 00:21:08.880 --> 00:21:11.520 the years 987 and 1052. 508 00:21:12.300 --> 00:21:14.380 Archaeologists working for Westminster Abbey 509 00:21:14.380 --> 00:21:16.380 believe the burns belonged to a high ranking 510 00:21:16.380 --> 00:21:18.780 mediaeval monk, Alweg, who was an abbot at 511 00:21:18.780 --> 00:21:21.460 the abbey and died around 1020 or possibly 512 00:21:21.460 --> 00:21:23.420 successor Woolnorth, who died in the year 513 00:21:23.420 --> 00:21:26.420 1049. A 514 00:21:26.420 --> 00:21:28.580 psychologist has identified three mental 515 00:21:28.580 --> 00:21:31.020 triggers that may help explain many so called 516 00:21:31.020 --> 00:21:33.820 ghost encounters. Dr. Melissa Maffeo 517 00:21:33.820 --> 00:21:36.420 says pure research suggests some 18% of 518 00:21:36.420 --> 00:21:38.780 American adults Claim to have seen ghosts. 519 00:21:39.370 --> 00:21:41.570 The sceptics. Timms Mendham says she stops 520 00:21:41.570 --> 00:21:43.610 short of declaring that ghosts aren't real, 521 00:21:43.610 --> 00:21:46.250 but lays out three specific factors that make 522 00:21:46.250 --> 00:21:48.690 some people far more prone to believe that 523 00:21:48.690 --> 00:21:49.690 they've encountered one. 524 00:21:49.690 --> 00:21:51.930 Tim Mendham: You come down to a basic idea. Is our ghosts 525 00:21:51.930 --> 00:21:53.770 real? And that might be an issue as well, 526 00:21:53.770 --> 00:21:55.370 where people see that there's a person who's 527 00:21:55.370 --> 00:21:57.290 coming up with particular ideas of what might 528 00:21:57.290 --> 00:21:59.410 influence people to believe that the ghost is 529 00:21:59.410 --> 00:22:01.690 real. The first one they suggest is that EMF 530 00:22:01.690 --> 00:22:03.770 machines, electromagnetic frequencies, are 531 00:22:03.770 --> 00:22:05.650 the machines that pick up to magnetic fields. 532 00:22:05.650 --> 00:22:07.450 I think is the actual term, excuse me, that 533 00:22:07.690 --> 00:22:09.890 pick up signals from wherever and it goes 534 00:22:09.890 --> 00:22:11.330 click, click, click on your. On your. Little 535 00:22:11.330 --> 00:22:12.530 like a Geiger counter thing. 536 00:22:12.530 --> 00:22:14.490 Stuart Gary: Yeah, we call them radios in my business. 537 00:22:15.530 --> 00:22:17.330 Tim Mendham: Well, it has to have a dial that swings 538 00:22:17.330 --> 00:22:19.250 around like a little all by itself. The 539 00:22:19.250 --> 00:22:21.090 answer, this person suggests is that these 540 00:22:21.090 --> 00:22:22.530 machines themselves are putting out 541 00:22:22.530 --> 00:22:25.530 frequencies which affects people's ability to 542 00:22:25.770 --> 00:22:28.290 assess a situation like infrasound, low 543 00:22:28.290 --> 00:22:30.450 sound, various sort of different types of 544 00:22:30.450 --> 00:22:32.850 sound frequencies that give people the sense 545 00:22:32.850 --> 00:22:35.690 of something, uneasiness, if you like, in an 546 00:22:35.690 --> 00:22:37.970 environment. And that therefore, rather than 547 00:22:37.970 --> 00:22:40.470 the machine reacting to a ghost presence, 548 00:22:40.470 --> 00:22:42.710 it's the machine is giving out a frequency 549 00:22:42.710 --> 00:22:44.710 that makes people think of ghosts. And 550 00:22:44.710 --> 00:22:46.070 certainly there are stories of interest, 551 00:22:46.310 --> 00:22:48.470 sound giving people sort of weird feelings, 552 00:22:48.520 --> 00:22:51.070 uh, unsure if you like. So yeah, maybe that 553 00:22:51.070 --> 00:22:53.110 is true. I don't know how effective that is. 554 00:22:53.190 --> 00:22:55.349 Then there's the. What's called the brain's 555 00:22:55.349 --> 00:22:58.310 wiring, the ability to track what's in the 556 00:22:58.310 --> 00:23:00.280 body, what's outside the body called, uh, 557 00:23:00.280 --> 00:23:02.950 temporoparietal junction. Try and say that 558 00:23:02.950 --> 00:23:05.350 one quickly. And that basically allows you to 559 00:23:05.350 --> 00:23:07.150 track where our body ends and where the 560 00:23:07.150 --> 00:23:08.790 outside world begins. And it's saying if 561 00:23:08.790 --> 00:23:10.110 there's a glitch in that, you're having 562 00:23:10.110 --> 00:23:11.770 trouble sort of differentiating between you 563 00:23:11.770 --> 00:23:13.160 and what's out there in the environment. Now, 564 00:23:13.160 --> 00:23:15.130 uh, that might give you an eerie sense that 565 00:23:15.130 --> 00:23:17.530 someone or something is present. Because you 566 00:23:17.530 --> 00:23:19.050 can't really differentiate. Perhaps with you 567 00:23:19.050 --> 00:23:20.130 that's present, you can't really 568 00:23:20.130 --> 00:23:21.850 differentiate between the two. The third one 569 00:23:21.850 --> 00:23:24.450 that they suggest is a possible reason why 570 00:23:24.450 --> 00:23:26.690 some people see ghosts is personality. 571 00:23:26.690 --> 00:23:29.410 Well, yeah, some people are more disposed 572 00:23:29.410 --> 00:23:31.370 towards believing in supernatural. The 573 00:23:31.370 --> 00:23:33.810 paranormal is for whatever reasons, societal, 574 00:23:33.810 --> 00:23:36.210 environmental, personal, mental, sort of 575 00:23:36.210 --> 00:23:37.770 whatever they have. And that some people are 576 00:23:37.770 --> 00:23:39.130 not. Well, you're starting off with that 577 00:23:39.130 --> 00:23:40.970 belief anyway. That idea that some people 578 00:23:40.970 --> 00:23:43.010 tend to want to believe and some people don't 579 00:23:43.010 --> 00:23:44.470 know necessarily want to believe. The level 580 00:23:44.470 --> 00:23:46.110 of evidence required, that's nothing 581 00:23:46.110 --> 00:23:47.790 particularly exciting about that. I mean, 582 00:23:47.790 --> 00:23:49.310 sure, there are probably a lot of reasons why 583 00:23:49.310 --> 00:23:51.150 people believe they see ghosts, and I think 584 00:23:51.150 --> 00:23:52.870 the personality is probably the the biggest 585 00:23:52.870 --> 00:23:55.030 one. Their inclination to believe is probably 586 00:23:55.030 --> 00:23:56.190 a really good, pretty good reason. 587 00:23:56.190 --> 00:23:58.750 Stuart Gary: That's the sceptics. Tim Mendham and this is 588 00:23:58.750 --> 00:23:59.549 Space Time. 589 00:24:15.160 --> 00:24:18.080 And that's the show for now. 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