Unraveling Dark Matter’s Origins, Mars’ Stunning Aurora Discovery, and New X-Ray Mysteries
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This episode of SpaceTime delves into groundbreaking discoveries and theories that reshape our understanding of the universe, including the origins of dark matter, the first visible light auroras on Mars, and new insights into massive X-ray explosions near supermassive black holes.
The Birth of Dark Matter Explained
A new hypothesis suggests that dark matter, which constitutes about 85% of the universe's mass, may have originated from massless particles that condensed as they slowed down. This theory, outlined in the journal Physical Review Letters, proposes that these particles formed during the early universe's chaotic conditions, akin to steam turning into water. We discuss how this model could be tested using existing cosmic microwave background radiation data, potentially revolutionizing our understanding of dark matter's properties and formation.
Visible Light Auroras on Mars
In a historic achievement, NASA's Perseverance rover has captured the first visible light auroras on Mars, confirming long-held theories about Martian atmospheric phenomena. This event, triggered by a massive solar flare, opens up new avenues for auroral research and suggests that future astronauts could witness these stunning displays on the Martian surface. We explore the implications of this discovery and how it enhances our understanding of solar interactions with planetary atmospheres.
Quasiperiodic Eruptions: A New Type of X-ray Explosion
Astronomers have identified a new type of X-ray outburst known as quasiperiodic eruptions, occurring near supermassive black holes. Observed in a galaxy 300 million light-years away, these eruptions exhibit a unique pattern, with events occurring every 4.5 days. We discuss the mechanisms behind these eruptions and their significance in understanding the dynamics of black holes and their surrounding environments.
www.spacetimewithstuartgary.com (
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✍️ Episode References
Physical Review Letters
https://journals.aps.org/prl/
(
https://journals.aps.org/prl/)
Science Advances
https://www.science.org/journal/sciadv
(
https://www.science.org/journal/sciadv)
Astrophysical Journal
https://iopscience.iop.org/journal/0004-637X
(
https://iopscience.iop.org/journal/0004-637X)
Become a supporter of this podcast:
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.
00:00 This is Space Time Series 28, Episode 62 for broadcast on 23 May 2025
01:00 New theory explaining the birth of dark matter
12:15 First visible light auroras detected on Mars
20:30 Discovery of quasiperiodic eruptions near supermassive black holes
30:00 Science report: AI chatbots exaggerate research summaries
Episode link: https://play.headliner.app/episode/27275484?utm_source=youtube
00:00 - This is Space Time Series 28, Episode 62 for broadcast on 23 May 2025
01:00 - New theory explaining the birth of dark matter
12:15 - First visible light auroras detected on Mars
20:30 - Discovery of quasiperiodic eruptions near supermassive black holes
Kind: captions
Language: en
00:00:08.160 --> 00:00:11.589
This is Spacetime series 28 episode 62
00:00:11.599 --> 00:00:14.190
for broadcast on the 23rd of May
00:00:14.200 --> 00:00:17.430
2025. Coming up on Spacetime, a new
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theory to explain the birth of dark
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matter, the first visible light auroral
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activity seen on Mars, and a new type of
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massive X-ray explosion discovered near
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monster black holes. All that and more
00:00:30.480 --> 00:00:33.990
coming up on Spaceime.
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Welcome to Space Time with Stuart Garry.
00:00:45.830 --> 00:00:53.110
[Music]
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A new study claims that the invisible
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mysterious substance known as dark
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matter may have formed when fast
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particles slowed down and got heavy. A
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new hypothesis reported in the journal
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Physical Review Letters suggests that
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dark matter, which makes up some 85% of
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all material in the universe, sprang up
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from particles that rapidly condensed,
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sort of like steam turning into water.
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Of course, scientists still have no idea
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exactly what dark matter is. They only
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know it exists because they can see its
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gravitational influence on normal
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so-called barriionic matter, stopping
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galaxies from spinning apart as they
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rotate and magnifying distant objects.
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The study's authors say dark matter
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could have formed in the early life of
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the universe from the collision of high
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energy massless particles that lost
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their zip and took on an incredible
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amount of mass immediately upon pairing.
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Importantly, they claim their hypothesis
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can be tested using existing
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observational data. The extremely low
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energy particles they suggest make up
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dark matter would have a unique
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signature in the cosmic microwave
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background radiation. The leftover
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energy from the Big Bang, which fills
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the universe today as a faint glow. The
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study's lead author, Robert Cordwell
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from Dartmouth College, says dark matter
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started its life as near massless
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relativistic particles similar to
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photons. Now, that's totally different
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to what dark matter is thought to be.
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Cold lumps that give galaxies their
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mass. Cordwall says this new idea tries
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to explain how dark matter went from
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being light to being lumpy. These
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particles were similar to photons,
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massless particles that are the basic
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energy or quant of light. And it was in
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this early chaos that extremely large
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numbers of these particles bonded to
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each other. Cordwall and colleagues
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theorized that these massless particles
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were pulled together by the opposing
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directions of their spin. Sort of like
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the attraction between the north and
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south poles of a magnet. As the
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particles cooled, an imbalance in the
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particles spins caused their energy to
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plummet like steer rapidly condensing
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into water. And the outcome was the cold
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heavy particles that scientists now
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think constitute dark matter. Now, the
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most unexpected part of this
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mathematical model was the energy
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plummet that bridges the high density
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energy and the lumpy low energy.
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Cordwell says at this stage, it's like
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these pairs were getting ready to become
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dark matter. And this phase transition
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helps explain the abundance of dark
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matter being detected today. It all
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sprang from high density clusters of
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extremely energetic particles in the
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early universe. The study introduces a
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theoretical particle that would have
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initiated the transition to dark matter.
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thing is scientists already know that
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electrons can undergo a similar
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transition. See at low temperatures two
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electrons can form what are known as
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Koopa pairs that can conduct electricity
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without resistance and are the active
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mechanism in certain
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superconductors. In fact the authors
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site the existence of Kooper pairs as
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evidence that the massless particles in
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their theory would have been capable of
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condensing into dark matter. They look
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towards superconductivity for clues as
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to whether a certain interaction could
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cause energy to drop so suddenly. And
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Koopa pairs are the proof that this
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mechanism exists. The metamorphosis of
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these particles from the cosmic
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equivalent of a double espresso into day
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old oatmeal explains the vast deficit in
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the energy density of the current
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universe compared to its early days.
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Scientists know that density has
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declined since the big bang as the
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universe's energies expanded outwards.
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But the author's new idea also accounts
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for the increase in the density of mass.
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They say structures get their mass due
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to the density of cold dark matter. But
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there also has to be a mechanism wherein
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energy density drops close to what we
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see around us today. And their theory
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suggests that the particle pairs entered
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a cold nearly pressureless state as they
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got slower and heavier. And this
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characteristic would make them stand out
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in the cosmic microwave background
00:04:43.520 --> 00:04:45.670
radiation. The cosmic microwave
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background radiation has been studied by
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several large scale projects and the
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authors say both existing and future
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data from these projects could be used
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to test their ideas. This is spaceime.
00:04:58.880 --> 00:05:00.870
Still to come, the first visible light
00:05:00.880 --> 00:05:03.670
aurora seen on Mars and a new type of
00:05:03.680 --> 00:05:06.070
massive X-ray explosion discovered near
00:05:06.080 --> 00:05:08.390
monster black holes. All that and more
00:05:08.400 --> 00:05:10.690
still to come on
00:05:10.700 --> 00:05:25.230
[Music]
00:05:25.240 --> 00:05:27.670
Spaceime. NASA's Mars Perseverance
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rovers made history by detecting visible
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light auroral activity on another planet
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for the first time. The detections were
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made during March last year near the
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peak of the current solar cycle and they
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were confirmed by NASA's Mars orbiting
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Maven spacecraft. The event reported in
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the journal Science Advances was
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triggered by a massive solar flare on
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the sun which generated a chronal mass
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ejection, a huge explosion of gas and
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magnetic energy that carries vast
00:05:54.560 --> 00:05:56.790
amounts of solar energetic particles out
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into space. And this solar activity led
00:05:59.759 --> 00:06:01.749
to stunning auroral displays across the
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solar system, including on Mars, where
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the six world cars size Perseverance
00:06:06.319 --> 00:06:08.830
rover saw them in the skies above Jezro
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Crater. The study's lead author, Elise
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Nudson from the University of Oslo, says
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the discovery opens up new possibilities
00:06:15.360 --> 00:06:17.749
for auroral research and confirms that
00:06:17.759 --> 00:06:19.749
aurora could be visible to future
00:06:19.759 --> 00:06:22.550
astronauts on the Martian surface. On
00:06:22.560 --> 00:06:24.629
Earth, auroray form when solar particles
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interact with the planet's global
00:06:26.000 --> 00:06:27.830
magnetic field, funneling these
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particles towards the poles along
00:06:29.440 --> 00:06:31.590
magnetic field lines, during which time
00:06:31.600 --> 00:06:33.590
they collide with atoms and molecules in
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the Earth's atmosphere, emitting light.
00:06:36.080 --> 00:06:37.909
The most common colors seen in Earthly
00:06:37.919 --> 00:06:40.070
aurora is green, caused by collisions
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with oxygen atoms. For years, scientists
00:06:42.960 --> 00:06:44.870
have theorized that green light auroras
00:06:44.880 --> 00:06:47.189
would also exist on Mars, but suggested
00:06:47.199 --> 00:06:49.110
they would be much fainter and harder to
00:06:49.120 --> 00:06:51.110
capture than the green auroral activity
00:06:51.120 --> 00:06:53.670
seen on Earth. Now, due to the red
00:06:53.680 --> 00:06:55.510
planet's lack of a global magnetic
00:06:55.520 --> 00:06:57.590
field, Mars has a different type of
00:06:57.600 --> 00:06:59.589
auroral activity to what we see on
00:06:59.599 --> 00:07:02.150
Earth. These include solar energetic
00:07:02.160 --> 00:07:03.749
particle aurora, which may have been
00:07:03.759 --> 00:07:06.790
discovered in 2014. These occur when
00:07:06.800 --> 00:07:08.469
superenergetic particles from the sun
00:07:08.479 --> 00:07:10.230
hit the Martian atmosphere, causing a
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reaction that makes the atmosphere glow
00:07:12.000 --> 00:07:14.710
across the entire night sky. Now, while
00:07:14.720 --> 00:07:16.790
Maven's already observed solar energetic
00:07:16.800 --> 00:07:18.790
particle aurora and ultraviolet light
00:07:18.800 --> 00:07:21.029
from Mars, the phenomenon's never been
00:07:21.039 --> 00:07:22.629
observed in visible light from the
00:07:22.639 --> 00:07:25.189
ground. Since solar energetic particle
00:07:25.199 --> 00:07:27.029
aurori typically occur during solar
00:07:27.039 --> 00:07:29.029
storms, which increase during solar
00:07:29.039 --> 00:07:31.510
maximum, like what we're in now, Mudson
00:07:31.520 --> 00:07:33.270
and colleagues set their sights on
00:07:33.280 --> 00:07:35.670
capturing visible images and spectra of
00:07:35.680 --> 00:07:37.830
solar energetic particle aurora from the
00:07:37.840 --> 00:07:39.990
Martian surface at the very peak of the
00:07:40.000 --> 00:07:42.230
sun's current solar cycle. Through
00:07:42.240 --> 00:07:44.150
modeling, Nutson determined the optimal
00:07:44.160 --> 00:07:46.309
angle for the Perseverance rover's super
00:07:46.319 --> 00:07:49.029
cam spectrometer mass cam Z camera to
00:07:49.039 --> 00:07:51.110
successfully observe the solar energetic
00:07:51.120 --> 00:07:53.589
particle aurora in visible light. And
00:07:53.599 --> 00:07:55.430
with this observational strategy now in
00:07:55.440 --> 00:07:57.270
place, it all came down to the timing
00:07:57.280 --> 00:07:59.270
and understanding the physics of coronal
00:07:59.280 --> 00:08:01.670
mass ejections. Scientists with the
00:08:01.680 --> 00:08:03.430
Maven mission determined there was a
00:08:03.440 --> 00:08:05.189
noticeable solar storm heading towards
00:08:05.199 --> 00:08:08.070
the red planet in March 2024, which
00:08:08.080 --> 00:08:09.749
should arrive a few days after the
00:08:09.759 --> 00:08:12.390
initial eruption on the sun. And so they
00:08:12.400 --> 00:08:14.230
issued a Mars space weather alert
00:08:14.240 --> 00:08:16.150
notification to all currently operating
00:08:16.160 --> 00:08:18.790
Mars missions. Few days later that
00:08:18.800 --> 00:08:21.029
coronal mass ejection impacted Mars
00:08:21.039 --> 00:08:22.869
providing a light show for the rover to
00:08:22.879 --> 00:08:24.790
capture and showing the aurora to be
00:08:24.800 --> 00:08:27.909
nearly uniform right across the sky. To
00:08:27.919 --> 00:08:29.990
confirm the presence of solar energetic
00:08:30.000 --> 00:08:31.430
particles during the auroral
00:08:31.440 --> 00:08:32.949
observations, the authors looked to
00:08:32.959 --> 00:08:34.709
Maven's solar energetic particle
00:08:34.719 --> 00:08:36.070
instrument which was additionally
00:08:36.080 --> 00:08:37.990
corroborated by data from the European
00:08:38.000 --> 00:08:40.870
Space Ay's Mars Express Orbiter. That
00:08:40.880 --> 00:08:42.550
data from both orbital missions
00:08:42.560 --> 00:08:44.230
confirmed that the rover team on the
00:08:44.240 --> 00:08:46.389
ground had managed to successfully catch
00:08:46.399 --> 00:08:48.550
a glimpse of the phenomenon in the very
00:08:48.560 --> 00:08:50.269
narrow time window
00:08:50.279 --> 00:08:52.509
available. This is
00:08:52.519 --> 00:08:55.509
spaceime. Still to come, a new type of
00:08:55.519 --> 00:08:57.750
massive X-ray explosion discovered near
00:08:57.760 --> 00:08:59.670
monster black holes and later in the
00:08:59.680 --> 00:09:01.670
science report, confirmation that
00:09:01.680 --> 00:09:04.070
artificial intelligence chatbots
00:09:04.080 --> 00:09:06.230
exaggerate the extent and scope of
00:09:06.240 --> 00:09:09.430
research in scientific papers. All that
00:09:09.440 --> 00:09:12.500
and more still to come on
00:09:12.510 --> 00:09:16.829
[Music]
00:09:16.839 --> 00:09:19.350
Spaceime. This episode of Spacetime is
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00:10:42.399 --> 00:10:44.389
Astronomers have for the first time
00:10:44.399 --> 00:10:46.230
probed the physical environment of a
00:10:46.240 --> 00:10:47.990
recently discovered new type of
00:10:48.000 --> 00:10:50.389
repeating X-ray outburst found to exist
00:10:50.399 --> 00:10:53.350
near monster super massive black holes.
00:10:53.360 --> 00:10:55.590
These massive X-ray flares have been
00:10:55.600 --> 00:10:58.389
named quasi periodic eruptions.
00:10:58.399 --> 00:11:00.069
Astronomers recently observed these
00:11:00.079 --> 00:11:02.470
events in a system named Ansky which is
00:11:02.480 --> 00:11:04.630
located in a galaxy about 300 million
00:11:04.640 --> 00:11:06.550
lighty years away in the constellation
00:11:06.560 --> 00:11:09.030
Virgo. This event was the first
00:11:09.040 --> 00:11:11.110
indication that something unusual might
00:11:11.120 --> 00:11:14.310
be happening. It was the eighth and so
00:11:14.320 --> 00:11:16.150
far most powerful quasi periodic
00:11:16.160 --> 00:11:18.310
eruption source discovered setting the
00:11:18.320 --> 00:11:19.990
record in terms of both timing and
00:11:20.000 --> 00:11:22.230
duration with eruptions every 4 and 1/2
00:11:22.240 --> 00:11:24.310
Earth days and with each eruption
00:11:24.320 --> 00:11:26.870
lasting around a day and a half. The
00:11:26.880 --> 00:11:28.630
observations were achieved by NASA's
00:11:28.640 --> 00:11:30.470
Neutron Star Interior Composition
00:11:30.480 --> 00:11:32.790
Explorer or NISER telescope which is
00:11:32.800 --> 00:11:34.389
mounted aboard the International Space
00:11:34.399 --> 00:11:36.790
Station. Additional information was
00:11:36.800 --> 00:11:39.030
provided by NASA's Swift Space Telescope
00:11:39.040 --> 00:11:41.430
and NASA's Chandra X-ray Observatory as
00:11:41.440 --> 00:11:43.750
well as the European Space Ay's XMM
00:11:43.760 --> 00:11:46.310
Newton Space Telescope. The study's lead
00:11:46.320 --> 00:11:48.069
author Joan Cheraborti from the
00:11:48.079 --> 00:11:49.829
Massachusetts Institute of Technology
00:11:49.839 --> 00:11:52.310
MIT says these quasyp periodic eruptions
00:11:52.320 --> 00:11:54.509
are both mysterious and intensely
00:11:54.519 --> 00:11:56.790
interesting. One of the most intriguing
00:11:56.800 --> 00:11:59.269
aspects is their quasyp periodic nature.
00:11:59.279 --> 00:12:00.870
See, astronomers are still trying to
00:12:00.880 --> 00:12:02.790
develop the mythologies and frameworks
00:12:02.800 --> 00:12:04.710
needed to understand exactly what's
00:12:04.720 --> 00:12:07.190
causing them. The findings reported in
00:12:07.200 --> 00:12:09.190
the Astrophysical Journal suggest that
00:12:09.200 --> 00:12:11.269
these eruptions occur in systems where a
00:12:11.279 --> 00:12:13.269
relatively low mass object passes
00:12:13.279 --> 00:12:15.269
through the disc of gas surrounding a
00:12:15.279 --> 00:12:17.269
super massive black hole that holds
00:12:17.279 --> 00:12:19.190
hundreds of thousands to billions of
00:12:19.200 --> 00:12:21.509
times the mass of the sun. When the
00:12:21.519 --> 00:12:23.030
lower mass object punches through the
00:12:23.040 --> 00:12:25.350
disc, its passage drives out expanding
00:12:25.360 --> 00:12:27.430
clouds of hot gas, which astronomers
00:12:27.440 --> 00:12:29.750
then observe as quasy periodic eruptions
00:12:29.760 --> 00:12:32.230
in X-rays. Astronomers think the
00:12:32.240 --> 00:12:34.310
eruption's quasi periodicity occurs
00:12:34.320 --> 00:12:36.389
because the smaller object's orbit isn't
00:12:36.399 --> 00:12:38.790
perfectly circular and spirals towards
00:12:38.800 --> 00:12:41.350
the black hole over time. Also, the
00:12:41.360 --> 00:12:43.190
extreme gravity close to the black hole
00:12:43.200 --> 00:12:45.269
warps the very fabric of spaceime,
00:12:45.279 --> 00:12:46.949
altering the object's orbit so they
00:12:46.959 --> 00:12:48.550
don't close on themselves with each
00:12:48.560 --> 00:12:51.110
cycle. Scientists current understanding
00:12:51.120 --> 00:12:52.949
suggest that these eruptions repeat
00:12:52.959 --> 00:12:55.350
until the disc disappears or until the
00:12:55.360 --> 00:12:57.430
orbiting object disintegrates, either of
00:12:57.440 --> 00:13:00.230
which could take several years. Ansky's
00:13:00.240 --> 00:13:02.069
extreme properties may be due to the
00:13:02.079 --> 00:13:03.750
nature of the disc around its super
00:13:03.760 --> 00:13:06.150
massive black hole. In most quasyp
00:13:06.160 --> 00:13:08.389
periodic eruption systems, super massive
00:13:08.399 --> 00:13:10.389
black hole likely shreds the passing
00:13:10.399 --> 00:13:12.470
star, creating a small disc very close
00:13:12.480 --> 00:13:15.190
to itself. But in Ansky's case, the
00:13:15.200 --> 00:13:17.350
authors think the disc is much larger
00:13:17.360 --> 00:13:19.509
and can involve objects further away,
00:13:19.519 --> 00:13:21.310
creating the longer time scales
00:13:21.320 --> 00:13:23.509
observed. Nice position on the
00:13:23.519 --> 00:13:25.670
International Space Station allows it to
00:13:25.680 --> 00:13:28.710
observe Ansky about 16 times every day.
00:13:28.720 --> 00:13:30.629
And this frequency of observations was
00:13:30.639 --> 00:13:32.230
critical in detecting the X-ray
00:13:32.240 --> 00:13:34.470
fluctuations that revealed Ansky was
00:13:34.480 --> 00:13:37.269
producing quasy periodic eruptions. The
00:13:37.279 --> 00:13:39.829
authors used data from Nicer and X-Men
00:13:39.839 --> 00:13:41.430
to map the rapid evolution of the
00:13:41.440 --> 00:13:43.430
ejected material driving the observed
00:13:43.440 --> 00:13:45.590
eruptions in unprecedented detail by
00:13:45.600 --> 00:13:47.750
studying variations in X-ray intensity
00:13:47.760 --> 00:13:49.550
during the rise and fall of each
00:13:49.560 --> 00:13:51.990
eruption. They found that each impact
00:13:52.000 --> 00:13:53.910
resulted in roughly about a quarter
00:13:53.920 --> 00:13:55.829
Jupiter's worth of mass reaching
00:13:55.839 --> 00:13:58.389
expansion velocities around 15% the
00:13:58.399 --> 00:14:01.110
speed of light. And NISA was then able
00:14:01.120 --> 00:14:03.030
to measure the size and temperature of
00:14:03.040 --> 00:14:05.110
the roughly spherical bubble of debris
00:14:05.120 --> 00:14:06.949
as it expanded.
00:14:06.959 --> 00:14:10.389
This report from NASA TV.
00:14:10.399 --> 00:14:11.990
From its perch on the International
00:14:12.000 --> 00:14:14.470
Space Station, NASA's NICER X-ray
00:14:14.480 --> 00:14:16.949
telescope has helped map a mysterious
00:14:16.959 --> 00:14:19.910
cosmic event for the first time. It
00:14:19.920 --> 00:14:22.069
happened in a galaxy 300 million lighty
00:14:22.079 --> 00:14:25.470
years away. Astronomers call this system
00:14:25.480 --> 00:14:27.990
Ansky. Ansky produces a type of
00:14:28.000 --> 00:14:31.189
recurring X-ray outburst called a QPE or
00:14:31.199 --> 00:14:34.310
quasi periodic eruption. These events
00:14:34.320 --> 00:14:37.189
were just recently discovered. Ansky is
00:14:37.199 --> 00:14:39.509
only the eighth known QPE emitter and is
00:14:39.519 --> 00:14:42.230
the most energetic to date. Some
00:14:42.240 --> 00:14:44.710
scientists think QPEs occur when a lower
00:14:44.720 --> 00:14:47.269
mass object orbits a super massive black
00:14:47.279 --> 00:14:50.310
hole in the center of a galaxy. When the
00:14:50.320 --> 00:14:52.310
smaller object passes through the disc
00:14:52.320 --> 00:14:54.870
of gas around the monster black hole, it
00:14:54.880 --> 00:14:56.949
produces a cloud of debris that causes
00:14:56.959 --> 00:14:59.670
an X-ray outburst. The low mass object
00:14:59.680 --> 00:15:02.150
isn't on a circular orbit and its motion
00:15:02.160 --> 00:15:03.829
is affected by the distortion of
00:15:03.839 --> 00:15:05.910
spaceime near the black hole. So the
00:15:05.920 --> 00:15:07.670
eruptions don't repeat over the same
00:15:07.680 --> 00:15:09.509
exact time frame which is what makes
00:15:09.519 --> 00:15:12.870
them quasi periodic. Ansky's outbursts
00:15:12.880 --> 00:15:14.710
are the longest of all the QPEs
00:15:14.720 --> 00:15:16.949
astronomers have studied with eruptions
00:15:16.959 --> 00:15:19.590
every 4.5 days or so that last
00:15:19.600 --> 00:15:22.550
approximately 1 and 1/2 days. That may
00:15:22.560 --> 00:15:25.030
be caused by a larger disc engulfing an
00:15:25.040 --> 00:15:27.910
object farther away. Nicer's
00:15:27.920 --> 00:15:30.069
observations of Ansky allowed scientists
00:15:30.079 --> 00:15:32.150
to probe the gas ejected from the disc
00:15:32.160 --> 00:15:34.870
after each collision. The gas expands,
00:15:34.880 --> 00:15:37.829
reaching velocities about 15% the speed
00:15:37.839 --> 00:15:40.470
of light and produces the X-rays we see
00:15:40.480 --> 00:15:41.470
as
00:15:41.480 --> 00:15:44.710
QPEs. Nicer and other missions will
00:15:44.720 --> 00:15:47.670
continue to study Ansky and other QPEs,
00:15:47.680 --> 00:15:49.829
helping astronomers reveal their
00:15:49.839 --> 00:15:51.670
secrets.
00:15:51.680 --> 00:15:55.720
This spaceime
00:15:55.730 --> 00:16:02.840
[Music]
00:16:07.830 --> 00:16:09.430
[Applause]
00:16:09.440 --> 00:16:11.189
And time now to take another brief look
00:16:11.199 --> 00:16:12.710
at some of the other stories making news
00:16:12.720 --> 00:16:14.629
in science this week with a science
00:16:14.639 --> 00:16:16.870
report. A new study has shown that
00:16:16.880 --> 00:16:18.870
artificial intelligence chatbots driven
00:16:18.880 --> 00:16:20.790
by large language models tend to
00:16:20.800 --> 00:16:22.870
exaggerate the scope of research when
00:16:22.880 --> 00:16:26.069
summarizing scientific papers. A report
00:16:26.079 --> 00:16:28.069
in the journal of the Royal Society Open
00:16:28.079 --> 00:16:31.430
Science analyzed 4,900 chatbot generated
00:16:31.440 --> 00:16:33.990
summaries of scientific abstracts. These
00:16:34.000 --> 00:16:36.150
abstracts themselves are short summaries
00:16:36.160 --> 00:16:37.670
found at the start of a scientific
00:16:37.680 --> 00:16:39.829
paper. They found the artificial
00:16:39.839 --> 00:16:41.910
intelligence was five times more likely
00:16:41.920 --> 00:16:44.230
to overgeneralize findings than a human
00:16:44.240 --> 00:16:46.710
expert. Now, the authors didn't ask the
00:16:46.720 --> 00:16:48.550
chatbots to write the summaries for an
00:16:48.560 --> 00:16:50.550
expert audience, but they did request
00:16:50.560 --> 00:16:53.030
systematic details and faithful abstract
00:16:53.040 --> 00:16:55.590
summaries in their prompts. Ironically,
00:16:55.600 --> 00:16:57.430
prompting for accuracy tended to
00:16:57.440 --> 00:16:59.749
increase overgeneralizations, and newer,
00:16:59.759 --> 00:17:01.749
larger language models were far less
00:17:01.759 --> 00:17:04.230
accurate than the older ones. In other
00:17:04.240 --> 00:17:06.390
words, AI is getting better at
00:17:06.400 --> 00:17:08.429
exaggerating and
00:17:08.439 --> 00:17:10.949
lying. Engineers have invented a small
00:17:10.959 --> 00:17:13.270
neuromorphic device that detects hand
00:17:13.280 --> 00:17:15.829
movement, stores memories, and processes
00:17:15.839 --> 00:17:17.590
information very much like a human
00:17:17.600 --> 00:17:19.510
brain, but without the need for an
00:17:19.520 --> 00:17:21.829
external computer. A report in the
00:17:21.839 --> 00:17:23.750
journal Advanced Materials Technologies
00:17:23.760 --> 00:17:25.669
claims the innovation marks a strong
00:17:25.679 --> 00:17:27.829
step towards enabling instant visual
00:17:27.839 --> 00:17:29.909
processing in autonomous vehicles as
00:17:29.919 --> 00:17:31.990
well as advanced robotics and other next
00:17:32.000 --> 00:17:34.070
generation applications for improved
00:17:34.080 --> 00:17:36.789
human interactions. Neuromorphic vision
00:17:36.799 --> 00:17:38.310
systems are designed to use similar
00:17:38.320 --> 00:17:40.470
analog processing to our brains which
00:17:40.480 --> 00:17:42.230
can greatly reduce the amount of energy
00:17:42.240 --> 00:17:44.630
needed to perform complex visual tasks
00:17:44.640 --> 00:17:46.390
compared with the digital technologies
00:17:46.400 --> 00:17:49.190
being used today.
00:17:49.200 --> 00:17:51.029
Scientists have discovered the oldest
00:17:51.039 --> 00:17:53.510
ancestor for all living Australian tree
00:17:53.520 --> 00:17:55.590
frogs. A report in the journal
00:17:55.600 --> 00:17:57.510
vertebrate paleontology has shown that
00:17:57.520 --> 00:17:59.590
the newly identified species has
00:17:59.600 --> 00:18:01.909
distinct links with tree frogs found in
00:18:01.919 --> 00:18:04.150
South America. Now, previously
00:18:04.160 --> 00:18:05.830
scientists believed Australian and South
00:18:05.840 --> 00:18:07.750
American tree frogs separated from each
00:18:07.760 --> 00:18:10.470
other about 33 million years ago. But
00:18:10.480 --> 00:18:12.310
the new discovery shows the split
00:18:12.320 --> 00:18:14.710
actually happened much earlier about 55
00:18:14.720 --> 00:18:17.110
million years ago.
00:18:17.120 --> 00:18:18.870
And now for the silliest story of the
00:18:18.880 --> 00:18:21.990
week. A former CIA agent claims he was
00:18:22.000 --> 00:18:24.230
taught to use his psychic abilities to
00:18:24.240 --> 00:18:26.390
undertake a remote viewing of the red
00:18:26.400 --> 00:18:29.190
planet Mars in its ancient past. And he
00:18:29.200 --> 00:18:32.150
claims he saw human civilizations there
00:18:32.160 --> 00:18:34.070
that were aware they were destined to
00:18:34.080 --> 00:18:36.390
face extinction. The trouble is Tim
00:18:36.400 --> 00:18:38.070
Mendum from Australian Skeptics points
00:18:38.080 --> 00:18:39.750
out that while astronomers have mapped
00:18:39.760 --> 00:18:41.430
every inch of the Martian surface by
00:18:41.440 --> 00:18:43.430
satellite, they yet to find any evidence
00:18:43.440 --> 00:18:46.630
of ancient ruins. Even the famous face
00:18:46.640 --> 00:18:49.110
on Mars sphinx and nearby pyramid-shaped
00:18:49.120 --> 00:18:51.029
structures all turned out to be nothing
00:18:51.039 --> 00:18:52.950
more than the simple play of light and
00:18:52.960 --> 00:18:55.590
shade on natural rock formations. The
00:18:55.600 --> 00:18:58.230
CIA did real tests of psychics during
00:18:58.240 --> 00:19:01.350
the 70s 80s. This is the remote viewing
00:19:01.360 --> 00:19:03.270
stuff. Yeah, remote viewing, the power
00:19:03.280 --> 00:19:04.549
to influence something else like
00:19:04.559 --> 00:19:07.029
telekinesis, move things, various things
00:19:07.039 --> 00:19:09.029
as they would and if you're really a
00:19:09.039 --> 00:19:10.549
follower of the CI as they probably
00:19:10.559 --> 00:19:12.630
should be trying out any avenue they
00:19:12.640 --> 00:19:14.150
could find to see if there's something
00:19:14.160 --> 00:19:16.390
to an advantage to their site, right?
00:19:16.400 --> 00:19:18.150
And they looked at psychic powers for a
00:19:18.160 --> 00:19:19.430
number of years and then after a while
00:19:19.440 --> 00:19:21.750
said nothing worth looking at here, not
00:19:21.760 --> 00:19:23.270
even anything that's sort of half
00:19:23.280 --> 00:19:25.029
inkling that could be developed and said
00:19:25.039 --> 00:19:26.070
there's nothing there to look at. And
00:19:26.080 --> 00:19:27.430
they spent a lot of money for it and
00:19:27.440 --> 00:19:28.789
ever since then people said, "Well, the
00:19:28.799 --> 00:19:30.549
CIA looked at it. It must be true." No,
00:19:30.559 --> 00:19:31.909
they looked at it. They try everything.
00:19:31.919 --> 00:19:33.190
They tried looking at people who can
00:19:33.200 --> 00:19:35.029
knock goats over with that thought. They
00:19:35.039 --> 00:19:36.549
look at all sorts of strange things just
00:19:36.559 --> 00:19:38.230
in case one of them proved true. And in
00:19:38.240 --> 00:19:40.470
a way, this is proof that it doesn't not
00:19:40.480 --> 00:19:41.909
true because they stopped. And they
00:19:41.919 --> 00:19:43.110
handed over all the information about
00:19:43.120 --> 00:19:44.950
it. It's available. Paper of the CIA
00:19:44.960 --> 00:19:46.630
investigations of UFOs. They readily
00:19:46.640 --> 00:19:48.070
handed over the information. They made a
00:19:48.080 --> 00:19:49.990
movie about it. Several. So this was
00:19:50.000 --> 00:19:51.750
someone who was supposedly was one of
00:19:51.760 --> 00:19:54.150
the subjects being tested by the CIA.
00:19:54.160 --> 00:19:55.750
It's called Project Stargate was the
00:19:55.760 --> 00:19:56.950
actual program that was looking at
00:19:56.960 --> 00:19:58.630
remote viewing, which is seeing things
00:19:58.640 --> 00:20:00.310
from a distance. And this fellow claimed
00:20:00.320 --> 00:20:01.909
he could also see into the past and the
00:20:01.919 --> 00:20:03.830
future. He was described himself as
00:20:03.840 --> 00:20:05.750
remote viewer number one. Say, "Wow, he
00:20:05.760 --> 00:20:07.350
must have been the best or the first. We
00:20:07.360 --> 00:20:08.750
had high opinions of
00:20:08.760 --> 00:20:10.870
himself." And he reckon he was given
00:20:10.880 --> 00:20:12.870
coordinates of a spot on Mars and the
00:20:12.880 --> 00:20:15.430
and the notation 1 million years BC. and
00:20:15.440 --> 00:20:17.750
a location and he spotted buildings, a
00:20:17.760 --> 00:20:19.990
pyramid and he spotted humans, actual
00:20:20.000 --> 00:20:21.830
humans but very tall humans who are
00:20:21.840 --> 00:20:23.510
looking very sad and very miserable
00:20:23.520 --> 00:20:25.029
because they were just about to be wiped
00:20:25.039 --> 00:20:27.830
out by some planet that brush past Mars
00:20:27.840 --> 00:20:29.590
and stole the atmosphere from Mars which
00:20:29.600 --> 00:20:30.549
would have happened very quickly. I
00:20:30.559 --> 00:20:31.750
think they must have had some warning.
00:20:31.760 --> 00:20:33.669
So the the visions he saw were inside
00:20:33.679 --> 00:20:36.310
this pyramid looked very sparse and lot
00:20:36.320 --> 00:20:37.990
looking sad and then they gone. They
00:20:38.000 --> 00:20:39.830
said there was definitely life on Mars.
00:20:39.840 --> 00:20:41.750
It's human. Not even humanoid. It's
00:20:41.760 --> 00:20:43.909
human. Big, tall, twice the size of us
00:20:43.919 --> 00:20:45.750
living in giant pyramids. The CIA
00:20:45.760 --> 00:20:47.270
seriously looking at this trying to find
00:20:47.280 --> 00:20:49.190
examples evidence and they couldn't find
00:20:49.200 --> 00:20:51.270
any. Okay. Whether you believe the CIA
00:20:51.280 --> 00:20:53.350
or not, this guy claims he did find
00:20:53.360 --> 00:20:55.029
something. He told them, and of course,
00:20:55.039 --> 00:20:56.710
instantly the evidence was covered up.
00:20:56.720 --> 00:20:58.630
So, he's come back here 50 years later,
00:20:58.640 --> 00:21:00.630
talk about what he what he discovered
00:21:00.640 --> 00:21:02.470
then as remote viewer number one.
00:21:02.480 --> 00:21:04.149
There's no way to prove it. Obviously, 1
00:21:04.159 --> 00:21:06.470
million years BC is a very very strange
00:21:06.480 --> 00:21:08.789
figure to choose. seeing tall humanoids
00:21:08.799 --> 00:21:10.149
to science. You just saw the movie
00:21:10.159 --> 00:21:12.630
Avatar. Yeah, quite possibly. It's just
00:21:12.640 --> 00:21:15.029
all too 1950s science fiction sort of
00:21:15.039 --> 00:21:17.190
thing. As much as we all love 1950s
00:21:17.200 --> 00:21:19.350
science fiction, it's not necessarily an
00:21:19.360 --> 00:21:21.590
accurate depiction of the way things
00:21:21.600 --> 00:21:24.149
are. That's Tim Mindum from Australian
00:21:24.159 --> 00:21:26.620
Skeptics.
00:21:26.630 --> 00:21:40.310
[Music]
00:21:40.320 --> 00:21:43.110
And that's the show for now. Spacetime
00:21:43.120 --> 00:21:44.870
is available every Monday, Wednesday,
00:21:44.880 --> 00:21:47.230
and Friday through bites.com,
00:21:47.240 --> 00:21:49.430
Soundcloud, YouTube, your favorite
00:21:49.440 --> 00:21:51.669
podcast download provider, and from
00:21:51.679 --> 00:21:53.470
spacetime
00:21:53.480 --> 00:21:55.510
withstartgary.com. Spacetime's also
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broadcast through the National Science
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Foundation on Science Zone Radio and on
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both iHeart Radio and TuneIn Radio. And
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you can help to support our show by
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visiting the Spacetime store for a range
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of promotional merchandising goodies, or
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by becoming a Spacetime patron, which
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gives you access to triple episode
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commercial free versions of the show, as
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well as lots of bonus audio content,
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which doesn't go to air, access to our
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exclusive Facebook group, and other
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rewards. Just go to
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spaceimewithstgarry.com for full
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details. You've been listening to
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Spacetime with Stuart Garry. This has
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been another quality podcast production
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from byes.com.