March 13, 2025
Dark Matter Stars, Ancient Craters & Lunar Missions: #503 - Unpacking the Latest Discoveries in Space
Space Nuts Episode 503: Dark Matter Stars, Australia's Oldest Impact Crater, and Mission Updates
Join Andrew Dunkley and Professor Fred Watson in this captivating episode of Space Nuts as they explore the latest discoveries and updates from the...
Space Nuts Episode 503: Dark Matter Stars, Australia's Oldest Impact Crater, and Mission Updates
Join Andrew Dunkley and Professor Fred Watson in this captivating episode of Space Nuts as they explore the latest discoveries and updates from the cosmos. From the intriguing possibility of dark matter stars to the revelation of the oldest impact crater on Earth, this episode is filled with exciting insights and engaging discussions that will spark your curiosity about the universe.
Episode Highlights:
- Dark Matter Stars: The episode kicks off with a discussion about the potential discovery of dark matter stars by the James Webb Space Telescope. Andrew and Fred delve into what these stars could mean for our understanding of the universe and how they might have formed shortly after the Big Bang.
- Oldest Impact Crater: The duo shares the exciting news of the oldest impact crater found in Western Australia, dating back over 3.5 billion years. They discuss the significance of this discovery and how it reshapes our understanding of continental formation through cosmic impacts.
- Blue Ghost Mission Update: Andrew provides an update on the Blue Ghost lunar lander, highlighting its successful operations on the Moon's surface and the scientific objectives it aims to achieve during its mission.
- Athena Mission Challenges: The conversation shifts to the challenges faced by the Athena mission, which unfortunately has been declared a failure after its lander tipped over on the lunar surface, preventing it from completing its objectives.
- Starship Explosion Recap: The episode wraps up with a recap of the recent Starship explosion during its flight test, discussing the implications for future missions and the challenges that lie ahead for SpaceX.
For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. Follow us on social media at SpaceNutsPod on Facebook, X, YouTube Music Music, Tumblr, Instagram, and TikTok. We love engaging with our community, so be sure to drop us a message or comment on your favorite platform.
If you'd like to help support Space Nuts and join our growing family of insiders for commercial-free episodes and more, visit spacenutspodcast.com/about
Stay curious, keep looking up, and join us next time for more stellar insights and cosmic wonders. Until then, clear skies and happy stargazing.
00:00 - Introduction and dark matter stars
02:15 - Discussion on the oldest impact crater
10:30 - Blue Ghost mission update
18:00 - Athena mission challenges
26:45 - Starship explosion recap
30:00 - Closing thoughts and listener engagement
✍️ Episode References
James Webb Space Telescope Discoveries
https://www.nasa.gov/webb
Oldest Impact Crater Research
https://www.theconversation.com/oldest-impact-crater-australia-123456
Blue Ghost Mission Details
https://www.firefly.com/blueghost
Starship Updates
https://www.spacex.com/starship
Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-exploring-the-cosmos--2631155/support.
Join Andrew Dunkley and Professor Fred Watson in this captivating episode of Space Nuts as they explore the latest discoveries and updates from the cosmos. From the intriguing possibility of dark matter stars to the revelation of the oldest impact crater on Earth, this episode is filled with exciting insights and engaging discussions that will spark your curiosity about the universe.
Episode Highlights:
- Dark Matter Stars: The episode kicks off with a discussion about the potential discovery of dark matter stars by the James Webb Space Telescope. Andrew and Fred delve into what these stars could mean for our understanding of the universe and how they might have formed shortly after the Big Bang.
- Oldest Impact Crater: The duo shares the exciting news of the oldest impact crater found in Western Australia, dating back over 3.5 billion years. They discuss the significance of this discovery and how it reshapes our understanding of continental formation through cosmic impacts.
- Blue Ghost Mission Update: Andrew provides an update on the Blue Ghost lunar lander, highlighting its successful operations on the Moon's surface and the scientific objectives it aims to achieve during its mission.
- Athena Mission Challenges: The conversation shifts to the challenges faced by the Athena mission, which unfortunately has been declared a failure after its lander tipped over on the lunar surface, preventing it from completing its objectives.
- Starship Explosion Recap: The episode wraps up with a recap of the recent Starship explosion during its flight test, discussing the implications for future missions and the challenges that lie ahead for SpaceX.
For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. Follow us on social media at SpaceNutsPod on Facebook, X, YouTube Music Music, Tumblr, Instagram, and TikTok. We love engaging with our community, so be sure to drop us a message or comment on your favorite platform.
If you'd like to help support Space Nuts and join our growing family of insiders for commercial-free episodes and more, visit spacenutspodcast.com/about
Stay curious, keep looking up, and join us next time for more stellar insights and cosmic wonders. Until then, clear skies and happy stargazing.
00:00 - Introduction and dark matter stars
02:15 - Discussion on the oldest impact crater
10:30 - Blue Ghost mission update
18:00 - Athena mission challenges
26:45 - Starship explosion recap
30:00 - Closing thoughts and listener engagement
✍️ Episode References
James Webb Space Telescope Discoveries
https://www.nasa.gov/webb
Oldest Impact Crater Research
https://www.theconversation.com/oldest-impact-crater-australia-123456
Blue Ghost Mission Details
https://www.firefly.com/blueghost
Starship Updates
https://www.spacex.com/starship
Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-exploring-the-cosmos--2631155/support.
WEBVTT
1
00:00:00.080 --> 00:00:02.680
Hello again, thank you for joining us. This is yet
2
00:00:02.720 --> 00:00:07.480
another episode of Space Nuts, the astronomy and space science
3
00:00:07.559 --> 00:00:11.839
podcast and radio show on the Community Radio Network in Australia.
4
00:00:11.919 --> 00:00:15.359
My name is Andrew Dunkley, your host, and coming up
5
00:00:15.400 --> 00:00:18.519
on this episode a question that we may or may
6
00:00:18.559 --> 00:00:21.000
not be able to answer. Did we just bind a
7
00:00:21.079 --> 00:00:24.839
dark matter star or a dark star to use the term.
8
00:00:25.480 --> 00:00:29.719
We will find out the oldest impact crator has been
9
00:00:29.760 --> 00:00:32.880
found and it's in Australia. And we're going to update
10
00:00:32.920 --> 00:00:35.159
a couple of missions, the Blue Ghost mission how is
11
00:00:35.200 --> 00:00:39.799
it going? And another mission called Athena that isn't going.
12
00:00:39.880 --> 00:00:44.759
We'll tell you why there's been another starship explosion. And
13
00:00:44.960 --> 00:00:47.320
if we've got time, we'll chuck on a success story
14
00:00:47.320 --> 00:00:49.000
because I think we're going to need one after all.
15
00:00:49.640 --> 00:00:52.920
It's all coming up on this edition of.
16
00:00:53.079 --> 00:01:03.600
Space Nuts fifteen, Channel ten nine Ignition Space Nuts or three.
17
00:01:03.759 --> 00:01:09.599
Two Space Nuts. When I bought it Bils.
18
00:01:09.319 --> 00:01:14.159
Good and the man of the moment feeling real groovy
19
00:01:14.280 --> 00:01:16.719
is Professor Fred Watson, an Astronomer at Large.
20
00:01:16.719 --> 00:01:21.000
Hello Fred, Hello Andrew, groovy, Baby yeah, just suck it
21
00:01:21.040 --> 00:01:21.920
to me and all.
22
00:01:21.840 --> 00:01:24.840
That stuff that one for a long time.
23
00:01:25.840 --> 00:01:30.640
Well yeah, like we're talking about in the promo. When
24
00:01:30.879 --> 00:01:32.560
you look at me, you're looking straight back to the
25
00:01:32.640 --> 00:01:33.560
nineteen fifties.
26
00:01:35.599 --> 00:01:38.799
Oh gosh, I didn't think light was that slow.
27
00:01:38.879 --> 00:01:40.840
No, it's pretty slow when it comes out here.
28
00:01:41.599 --> 00:01:46.640
Indeed, now, we got a lot on this episode, and
29
00:01:47.159 --> 00:01:50.359
the very first story I ordered to tackle was this
30
00:01:50.400 --> 00:01:54.120
one about the possible discovery of a dark star. Now,
31
00:01:54.159 --> 00:01:59.079
we've had quite a few questions from people asking if
32
00:01:59.079 --> 00:02:03.159
they exist and what are they, and we've basically said, well,
33
00:02:03.200 --> 00:02:06.560
you know, they might exist, we haven't found one yet.
34
00:02:07.079 --> 00:02:11.000
And now the James web Space Telescope may well have
35
00:02:11.240 --> 00:02:11.919
spied one.
36
00:02:13.400 --> 00:02:17.919
Yes, actually they might have spied three, because there are
37
00:02:17.919 --> 00:02:23.879
three candidates for these dark matter stars. And so just
38
00:02:24.599 --> 00:02:30.599
setting the scene, the story of the universe is that, yes,
39
00:02:30.639 --> 00:02:34.000
there was a big bang and took a little while
40
00:02:34.000 --> 00:02:36.199
for atoms and things to form, But that all happened.
41
00:02:37.039 --> 00:02:41.240
We had a period called the Dark Ages when the
42
00:02:41.360 --> 00:02:44.520
universe was filled with basically called hydrogen.
43
00:02:44.479 --> 00:02:47.400
And there were nights.
44
00:02:48.400 --> 00:02:53.000
Nights Yeah with ok or without okay, whichever one you wanted.
45
00:02:56.000 --> 00:02:59.039
It's yeah, the Dark Ages before the first stars and
46
00:02:59.080 --> 00:03:01.560
galaxies formed, and I think the first stars to form
47
00:03:02.159 --> 00:03:04.919
were what we and we've sometimes talked about these population
48
00:03:05.080 --> 00:03:11.759
three stars, which are basically completely devoid of anything other
49
00:03:11.800 --> 00:03:14.599
than hydrogen and helium in the spectrum, because those two
50
00:03:14.840 --> 00:03:17.759
elements were formed in the Big Bang, and we know
51
00:03:17.840 --> 00:03:20.240
that all the other elements actually there was a trace
52
00:03:20.240 --> 00:03:22.520
of lithium as well a couple of other things, but
53
00:03:22.599 --> 00:03:26.159
nothing to worry about. All the other elements were formed
54
00:03:26.560 --> 00:03:29.080
in the interiors of stars as the universe progressed. So
55
00:03:29.120 --> 00:03:32.960
all the stuff we're made of from the hydrogen was
56
00:03:33.000 --> 00:03:35.719
once inside a star. And that's kind of, you know,
57
00:03:35.759 --> 00:03:38.120
the story of our origin. It's our creation story in
58
00:03:38.159 --> 00:03:38.560
a sense.
59
00:03:39.080 --> 00:03:42.199
So what people have been looking for is population three stars.
60
00:03:42.560 --> 00:03:45.840
They called that for historical reasons, but they're stars that
61
00:03:45.879 --> 00:03:49.240
would have been the first stars to form, and they
62
00:03:49.840 --> 00:03:52.599
would have been bright. They would have, you been much
63
00:03:52.639 --> 00:03:57.039
brighter than the sun. But the thinking has been over
64
00:03:57.240 --> 00:04:02.280
I guess the last maybe ten years, since we know
65
00:04:03.240 --> 00:04:06.520
that more than three quarters of the matter in the
66
00:04:06.599 --> 00:04:09.439
universe is dark matter. It's this stuff that we know
67
00:04:09.639 --> 00:04:13.599
exists because it holds galaxies together and stops them flying apart.
68
00:04:13.639 --> 00:04:16.480
It's got its own it's got gravity, doesn't interact in
69
00:04:16.519 --> 00:04:21.600
any other way with normal matter. So we believe dark
70
00:04:21.639 --> 00:04:25.279
matter originated in the Big Bang as well, like the hydrogen.
71
00:04:26.120 --> 00:04:31.839
And so the postulate has always been made by always,
72
00:04:31.839 --> 00:04:34.720
I mean within the last decade or so. It's probably
73
00:04:34.759 --> 00:04:38.000
actually more recently than that, even probably only over the
74
00:04:38.079 --> 00:04:42.680
last five years. The postulate was, could you have objects
75
00:04:43.319 --> 00:04:49.680
which basically made of clumps of dark matter coming together
76
00:04:49.959 --> 00:04:54.079
under their own gravity like hydrogen does in normal stars.
77
00:04:54.639 --> 00:04:58.680
But this stuff clumps together, it compresses because its own
78
00:04:58.720 --> 00:05:00.920
gravity is so strong. So you got this huge lump
79
00:05:01.000 --> 00:05:05.279
of dark matter. And what it then does is, and
80
00:05:05.319 --> 00:05:10.680
this is still a hypothesis, we believe that dark matter
81
00:05:11.319 --> 00:05:15.759
self annihilates if you get it particles too close together.
82
00:05:15.800 --> 00:05:19.000
It's a bit like matter and antimatter. You know, normal
83
00:05:19.040 --> 00:05:22.600
matter and antimatter is matter with an opposite electric charge.
84
00:05:22.600 --> 00:05:24.879
You bring them together and you get radiation, you get
85
00:05:24.920 --> 00:05:29.680
gamma rays. So the thinking is that the same might
86
00:05:29.759 --> 00:05:32.439
happen with dark matter. You bring particles of dark matter,
87
00:05:32.480 --> 00:05:37.199
they self annihilate and produce a lot of energy, and
88
00:05:37.480 --> 00:05:41.279
maybe perhaps even what's left might act as the nucleus
89
00:05:41.319 --> 00:05:45.839
for galaxies to form. But the idea is that these
90
00:05:45.920 --> 00:05:49.079
dark stars, and it's a ridiculous name because they're billions
91
00:05:49.120 --> 00:05:52.439
of times brighter than the Sun, but they're made of
92
00:05:52.519 --> 00:05:55.600
dark matter, which is why you know that name comes
93
00:05:55.720 --> 00:05:59.120
maybe a million times its mass. The thinking is that
94
00:05:59.199 --> 00:06:02.439
they may have eventually condense to become the super massive
95
00:06:02.439 --> 00:06:05.360
black holes that we find in the censers of galaxies,
96
00:06:05.680 --> 00:06:09.639
and we find them at an age of the universe
97
00:06:09.680 --> 00:06:14.560
that was earlier than we can kind of understand anyway.
98
00:06:14.959 --> 00:06:19.439
The the there are three objects that have been observed
99
00:06:19.439 --> 00:06:23.600
by the James Webb Space Telescope which are formally delineated
100
00:06:23.639 --> 00:06:32.079
as galaxies, but they have characteristics in them that have
101
00:06:32.279 --> 00:06:39.079
made a number of researchers and this this work is
102
00:06:39.279 --> 00:06:46.800
you know, it's it's coming from US universities, and in
103
00:06:46.839 --> 00:06:50.399
fact a number of US universities have collaborated on this.
104
00:06:51.399 --> 00:06:59.480
But the the the the the point about these observations
105
00:07:00.240 --> 00:07:05.319
is that whilst they originally were identified as galaxies because
106
00:07:05.839 --> 00:07:08.079
we see them, you know, when the universe was three
107
00:07:08.199 --> 00:07:11.319
hundred million years old, we're looking back in time almost
108
00:07:11.399 --> 00:07:13.240
the whole age of the universe. They look like just
109
00:07:13.279 --> 00:07:16.920
like blobs to the Web telescope, and they look like
110
00:07:17.279 --> 00:07:19.439
a lot of the other galaxies. But it's their spectrum
111
00:07:19.920 --> 00:07:26.160
that is raising the possibility that these are dark matter stars.
112
00:07:26.240 --> 00:07:31.839
And the problem is we don't we know so little
113
00:07:31.879 --> 00:07:37.360
about dark matter that you know, it's a hypothesis. It's
114
00:07:37.399 --> 00:07:40.600
a hypothesis that dark matter self annihilates. We don't know
115
00:07:40.639 --> 00:07:45.720
that for certain. But the deal is that there is
116
00:07:45.839 --> 00:07:53.199
enough evidence from the spectra of these objects that makes
117
00:07:53.560 --> 00:07:57.519
people think that they are dark matter stars. And I'm
118
00:07:57.519 --> 00:08:02.399
going to quote one of the researchers on this topic.
119
00:08:04.519 --> 00:08:13.279
It's Dr Freese fr W. E. S E who has said,
120
00:08:14.040 --> 00:08:18.000
and it's a really nice quote, you've if you've got
121
00:08:18.040 --> 00:08:22.800
a dark matter star forming, Dr Frees says, you've got
122
00:08:22.800 --> 00:08:26.240
a weird thing. It looks like the Sun in terms
123
00:08:26.279 --> 00:08:30.199
of its surface temperature, but it's a billion times as bright.
124
00:08:30.759 --> 00:08:34.240
It could be as bright as an entire galaxy of
125
00:08:34.320 --> 00:08:37.639
fusion powered stars. That means stars that are powered by hydrogen.
126
00:08:38.480 --> 00:08:40.919
And then the thinking is, as I said, that at
127
00:08:40.919 --> 00:08:43.480
the end of their lives they would collapse into super
128
00:08:43.519 --> 00:08:51.039
massive black holes. So this is really quite an extraordinary postulate.
129
00:08:51.519 --> 00:08:54.120
But it is gaining traction. And this is you know,
130
00:08:54.159 --> 00:08:59.720
this is not something that's that's being highlight well, it
131
00:08:59.759 --> 00:09:04.399
is highlighted in the slightly more frenetic science press matter
132
00:09:04.480 --> 00:09:07.759
stars form found. I mean this is coming. In fact,
133
00:09:07.759 --> 00:09:10.120
the article I'm looking at it's from Scientific American, which
134
00:09:10.159 --> 00:09:14.919
is one of the most sober and accurate of all
135
00:09:14.960 --> 00:09:18.799
the science media feeds. So yes, so have a look
136
00:09:18.799 --> 00:09:22.159
at that article. J WSC might have spotted the first
137
00:09:22.240 --> 00:09:24.799
dark matter stars. And if you can make more of
138
00:09:24.840 --> 00:09:30.039
it than I can, that's good because the the you know,
139
00:09:30.080 --> 00:09:35.039
the researchers are still growping with the fact that we
140
00:09:35.120 --> 00:09:40.200
know so little about dark matter. And it's one of
141
00:09:40.240 --> 00:09:42.639
the co authors and then the doctor Freezer just mentioned,
142
00:09:42.720 --> 00:09:46.000
Catherine Freese, who's an astrophysicist at the University of Texas
143
00:09:46.039 --> 00:09:46.720
at Austin.
144
00:09:48.240 --> 00:09:54.639
It's fascinating because these are once again named very inaccurately,
145
00:09:56.000 --> 00:09:58.720
as is dark energy. So let's just be a dark
146
00:09:58.759 --> 00:10:04.000
star that's not dark. Yeah, it is a bit. But
147
00:10:04.720 --> 00:10:07.120
I think one of the questions that popped out as
148
00:10:07.120 --> 00:10:10.960
you were explaining it was these happened very early in
149
00:10:11.000 --> 00:10:17.440
the universe three three hundred millionaires a big bang. Does
150
00:10:17.480 --> 00:10:22.039
that mean that these may have existed no longer exist.
151
00:10:23.519 --> 00:10:25.919
I think that's the thinking that they have a very
152
00:10:25.960 --> 00:10:31.919
short life. But the debris becomes the super massive black hole,
153
00:10:32.480 --> 00:10:34.600
and so in a way, these things might form the
154
00:10:34.679 --> 00:10:38.120
nucleus of galaxies, you know, baby galaxies that are being
155
00:10:38.159 --> 00:10:41.720
formed in the other universe. It's a really exciting prospect
156
00:10:41.759 --> 00:10:44.559
and I hope we'll hear more about this and talk
157
00:10:44.600 --> 00:10:47.679
more about it. I know our listeners, Andrew and our
158
00:10:47.799 --> 00:10:51.360
viewers have latched onto this over the last couple of
159
00:10:51.399 --> 00:10:53.639
years because we've had several questions about this already, but
160
00:10:53.720 --> 00:10:56.519
it's now sort of bubbling to the surface with these
161
00:10:56.519 --> 00:11:01.240
three galaxy candidates, which I mean currently they're still thought
162
00:11:01.279 --> 00:11:04.320
to be galaxies, but the possibility that they are actually
163
00:11:04.360 --> 00:11:08.960
dark matter stars is becoming very, very insistent.
164
00:11:09.200 --> 00:11:14.399
I think the original paper published about these three potential
165
00:11:14.480 --> 00:11:18.720
galaxies was July twenty twenty three, but now they've taken
166
00:11:18.759 --> 00:11:21.519
another look at them and they're thinking, going on a minute,
167
00:11:22.200 --> 00:11:27.840
this might be some other dark matter onborn. Anyway, as
168
00:11:27.879 --> 00:11:32.039
Fred said, you can look it up at Scientificamerican dot com.
169
00:11:32.039 --> 00:11:37.080
It's a fabulous article. Now, Fred, let's get very close
170
00:11:37.120 --> 00:11:39.879
to home for us. Well not really because it's in
171
00:11:39.919 --> 00:11:45.559
Western Australia, but they've just announced that the oldest impact
172
00:11:45.679 --> 00:11:50.000
crater has been found in Western Australia, which basically means
173
00:11:50.440 --> 00:11:54.759
in Australia we have now got the oldest and the largest.
174
00:11:54.799 --> 00:11:58.159
They're not the same one. The largest is actually in
175
00:11:58.200 --> 00:12:03.960
New South Wales, but the oldest is in that very
176
00:12:04.000 --> 00:12:07.120
remote area of western Australia and around the Pilbray, isn't it.
177
00:12:07.600 --> 00:12:09.960
Yes, it's a Pilborough region that's right sort of north
178
00:12:10.159 --> 00:12:15.399
northwestern Australia, very empty part of the country, a bit
179
00:12:15.480 --> 00:12:19.960
unforgiving if you happen to be lost there. But our
180
00:12:20.279 --> 00:12:23.840
heroes in this story aren't They're scientists from Curtain University.
181
00:12:24.759 --> 00:12:30.240
And what's really nice about this story is that these
182
00:12:30.279 --> 00:12:35.559
scientists actually predicted that there might be an impact crater
183
00:12:36.080 --> 00:12:39.559
kind of pretty well in the middle of Australia. And
184
00:12:39.639 --> 00:12:46.759
what led them to that conclusion is a sort of
185
00:12:46.840 --> 00:12:56.600
alternative view of how continents formed. So the geological thinking
186
00:12:56.840 --> 00:13:01.120
around continents, which of course are represented by continental plates,
187
00:13:02.080 --> 00:13:08.759
you know, the plate tectonics theory. One I guess of
188
00:13:08.799 --> 00:13:13.120
the perhaps the most popular view is that the continents
189
00:13:13.639 --> 00:13:19.120
formed above plumes in the Earth's mantle, which is that
190
00:13:19.240 --> 00:13:22.399
sort of soft region between the core which is deep
191
00:13:22.440 --> 00:13:24.279
in the center of the Earth and the crust which
192
00:13:24.320 --> 00:13:28.120
is the thin layer that surrounds it. So you've got
193
00:13:28.240 --> 00:13:32.240
these plumes coming up, and everybody draws the same analogy.
194
00:13:32.279 --> 00:13:35.960
It's like a lava lamp, the wax rising. They come
195
00:13:36.080 --> 00:13:40.960
up and they basically, you know that the plume of
196
00:13:40.960 --> 00:13:45.840
hot stuff, so the condenses out or solidifies on the
197
00:13:45.919 --> 00:13:50.440
underneath of the continental plate, and you get a continental plate.
198
00:13:52.919 --> 00:13:55.519
I think there's a there's another one that says that
199
00:13:55.639 --> 00:14:01.840
actually it was just plate tectonics. You know, as plates
200
00:14:02.080 --> 00:14:06.080
collide with each other, there's often what's called a subduction zone,
201
00:14:06.120 --> 00:14:08.799
which is where one plate slides underneath the other. And
202
00:14:08.879 --> 00:14:11.679
so the suggestion is that as plates slide underneath the
203
00:14:11.720 --> 00:14:15.200
continental plates, the continental plates build and become thicker. And
204
00:14:15.919 --> 00:14:20.240
those are the two main theories. But these scientists that curtain,
205
00:14:21.440 --> 00:14:24.639
and I mean they published an original paper on this
206
00:14:24.759 --> 00:14:31.200
several years ago, they suggest that the energy required to
207
00:14:31.320 --> 00:14:37.639
make continents actually came from impacts. So you know, an
208
00:14:37.679 --> 00:14:42.519
impact that might be an object that's many, many kilometers
209
00:14:42.519 --> 00:14:45.360
in diameter. Remember the dinosaur killer was about ten to
210
00:14:45.440 --> 00:14:52.200
fifteen kilometers. Impacts on the surface basically put a huge
211
00:14:52.200 --> 00:14:55.000
amount of energy into the surface. You've only to look
212
00:14:55.080 --> 00:14:59.639
at one of the simulations of what the dinosaur killing
213
00:14:59.639 --> 00:15:02.759
astroid that created the Chickilub crater, what that did to
214
00:15:02.840 --> 00:15:05.639
the earth during the first fifteen minutes. It sort of
215
00:15:05.720 --> 00:15:08.480
just turned the surface into liquid and you get a
216
00:15:08.480 --> 00:15:16.159
big splash. And they suggested that an impact might be
217
00:15:16.320 --> 00:15:22.000
enough to basically generate the material that you need to
218
00:15:22.080 --> 00:15:26.799
make a continent. Maybe more than one collision, but the impact.
219
00:15:27.399 --> 00:15:31.679
And I'm going to quote because there's a lovely article
220
00:15:31.679 --> 00:15:34.559
on this written by these authors themselves. It's in the Conversation.
221
00:15:35.440 --> 00:15:38.720
It's called soleest impact crator was just found in Australia,
222
00:15:38.879 --> 00:15:43.879
exactly where geologists soaked it would be. So what they
223
00:15:43.919 --> 00:15:46.279
say in that article, and they're talking now about the
224
00:15:46.360 --> 00:15:55.320
idea of impacts creating the continental crust our evidence that, yeah,
225
00:15:55.519 --> 00:15:59.559
Our evidence lay in the chemical composition of tiny crystals
226
00:15:59.559 --> 00:16:02.480
of the mini zircon about the size of sand grains,
227
00:16:02.919 --> 00:16:07.639
so they are generally produced by impact. But to persuade
228
00:16:07.679 --> 00:16:11.720
other geologists, we needed more convincing evidence, preferably something people
229
00:16:11.759 --> 00:16:15.120
could see without needing a microscope. So in May twenty
230
00:16:15.200 --> 00:16:17.919
twenty one we began the long drive north from Perth
231
00:16:17.919 --> 00:16:20.240
for two weeks of field work in the Pilborough where
232
00:16:20.240 --> 00:16:22.519
we meet up with our partners from the Geological Survey
233
00:16:22.559 --> 00:16:25.200
of Western Australia to hunt for the crater. And then
234
00:16:25.240 --> 00:16:28.120
they tell the story of what they found. And they
235
00:16:28.279 --> 00:16:32.519
found the evidence very very quickly, within the first hour
236
00:16:32.960 --> 00:16:38.639
of being Yeah, because what they found was shatter cones.
237
00:16:40.039 --> 00:16:43.000
And let me quote again from the article, shatter cones
238
00:16:43.000 --> 00:16:47.360
are beautiful, delicate branching structures, not dissimilar to Badminton choppercock.
239
00:16:48.000 --> 00:16:51.720
They are the only feature of shock visible to the
240
00:16:51.799 --> 00:16:55.679
naked eye, and in nature, can only form following a
241
00:16:55.720 --> 00:16:59.200
meteorite impact. Little more than an hour into our search,
242
00:16:59.240 --> 00:17:02.720
we've found precise what we were looking for. We'd literally
243
00:17:02.720 --> 00:17:04.759
open the doors of our four wheel drives and stepped
1
00:00:00.080 --> 00:00:02.680
2
00:00:02.720 --> 00:00:07.480
3
00:00:07.559 --> 00:00:11.839
4
00:00:11.919 --> 00:00:15.359
5
00:00:15.400 --> 00:00:18.519
6
00:00:18.559 --> 00:00:21.000
7
00:00:21.079 --> 00:00:24.839
8
00:00:25.480 --> 00:00:29.719
9
00:00:29.760 --> 00:00:32.880
10
00:00:32.920 --> 00:00:35.159
11
00:00:35.200 --> 00:00:39.799
12
00:00:39.880 --> 00:00:44.759
13
00:00:44.960 --> 00:00:47.320
14
00:00:47.320 --> 00:00:49.000
15
00:00:49.640 --> 00:00:52.920
16
00:00:53.079 --> 00:01:03.600
17
00:01:03.759 --> 00:01:09.599
18
00:01:09.319 --> 00:01:14.159
19
00:01:14.280 --> 00:01:16.719
20
00:01:16.719 --> 00:01:21.000
21
00:01:21.040 --> 00:01:21.920
22
00:01:21.840 --> 00:01:24.840
23
00:01:25.840 --> 00:01:30.640
24
00:01:30.879 --> 00:01:32.560
25
00:01:32.640 --> 00:01:33.560
26
00:01:35.599 --> 00:01:38.799
27
00:01:38.879 --> 00:01:40.840
28
00:01:41.599 --> 00:01:46.640
29
00:01:47.159 --> 00:01:50.359
30
00:01:50.400 --> 00:01:54.120
31
00:01:54.159 --> 00:01:59.079
32
00:01:59.079 --> 00:02:03.159
33
00:02:03.200 --> 00:02:06.560
34
00:02:07.079 --> 00:02:11.000
35
00:02:11.240 --> 00:02:11.919
36
00:02:13.400 --> 00:02:17.919
37
00:02:17.919 --> 00:02:23.879
38
00:02:24.599 --> 00:02:30.599
39
00:02:30.639 --> 00:02:34.000
40
00:02:34.000 --> 00:02:36.199
41
00:02:37.039 --> 00:02:41.240
42
00:02:41.360 --> 00:02:44.520
43
00:02:44.479 --> 00:02:47.400
44
00:02:48.400 --> 00:02:53.000
45
00:02:56.000 --> 00:02:59.039
46
00:02:59.080 --> 00:03:01.560
47
00:03:02.159 --> 00:03:04.919
48
00:03:05.080 --> 00:03:11.759
49
00:03:11.800 --> 00:03:14.599
50
00:03:14.840 --> 00:03:17.759
51
00:03:17.840 --> 00:03:20.240
52
00:03:20.240 --> 00:03:22.520
53
00:03:22.599 --> 00:03:26.159
54
00:03:26.560 --> 00:03:29.080
55
00:03:29.120 --> 00:03:32.960
56
00:03:33.000 --> 00:03:35.719
57
00:03:35.759 --> 00:03:38.120
58
00:03:38.159 --> 00:03:38.560
59
00:03:39.080 --> 00:03:42.199
60
00:03:42.560 --> 00:03:45.840
61
00:03:45.879 --> 00:03:49.240
62
00:03:49.840 --> 00:03:52.599
63
00:03:52.639 --> 00:03:57.039
64
00:03:57.240 --> 00:04:02.280
65
00:04:03.240 --> 00:04:06.520
66
00:04:06.599 --> 00:04:09.439
67
00:04:09.639 --> 00:04:13.599
68
00:04:13.639 --> 00:04:16.480
69
00:04:16.519 --> 00:04:21.600
70
00:04:21.639 --> 00:04:25.279
71
00:04:26.120 --> 00:04:31.839
72
00:04:31.839 --> 00:04:34.720
73
00:04:34.759 --> 00:04:38.000
74
00:04:38.079 --> 00:04:42.680
75
00:04:43.319 --> 00:04:49.680
76
00:04:49.959 --> 00:04:54.079
77
00:04:54.639 --> 00:04:58.680
78
00:04:58.720 --> 00:05:00.920
79
00:05:01.000 --> 00:05:05.279
80
00:05:05.319 --> 00:05:10.680
81
00:05:11.319 --> 00:05:15.759
82
00:05:15.800 --> 00:05:19.000
83
00:05:19.040 --> 00:05:22.600
84
00:05:22.600 --> 00:05:24.879
85
00:05:24.920 --> 00:05:29.680
86
00:05:29.759 --> 00:05:32.439
87
00:05:32.480 --> 00:05:37.199
88
00:05:37.480 --> 00:05:41.279
89
00:05:41.319 --> 00:05:45.839
90
00:05:45.920 --> 00:05:49.079
91
00:05:49.120 --> 00:05:52.439
92
00:05:52.519 --> 00:05:55.600
93
00:05:55.720 --> 00:05:59.120
94
00:05:59.199 --> 00:06:02.439
95
00:06:02.439 --> 00:06:05.360
96
00:06:05.680 --> 00:06:09.639
97
00:06:09.680 --> 00:06:14.560
98
00:06:14.959 --> 00:06:19.439
99
00:06:19.439 --> 00:06:23.600
100
00:06:23.639 --> 00:06:32.079
101
00:06:32.279 --> 00:06:39.079
102
00:06:39.279 --> 00:06:46.800
103
00:06:46.839 --> 00:06:50.399
104
00:06:51.399 --> 00:06:59.480
105
00:07:00.240 --> 00:07:05.319
106
00:07:05.839 --> 00:07:08.079
107
00:07:08.199 --> 00:07:11.319
108
00:07:11.399 --> 00:07:13.240
109
00:07:13.279 --> 00:07:16.920
110
00:07:17.279 --> 00:07:19.439
111
00:07:19.920 --> 00:07:26.160
112
00:07:26.240 --> 00:07:31.839
113
00:07:31.879 --> 00:07:37.360
114
00:07:37.399 --> 00:07:40.600
115
00:07:40.639 --> 00:07:45.720
116
00:07:45.839 --> 00:07:53.199
117
00:07:53.560 --> 00:07:57.519
118
00:07:57.519 --> 00:08:02.399
119
00:08:04.519 --> 00:08:13.279
120
00:08:14.040 --> 00:08:18.000
121
00:08:18.040 --> 00:08:22.800
122
00:08:22.800 --> 00:08:26.240
123
00:08:26.279 --> 00:08:30.199
124
00:08:30.759 --> 00:08:34.240
125
00:08:34.320 --> 00:08:37.639
126
00:08:38.480 --> 00:08:40.919
127
00:08:40.919 --> 00:08:43.480
128
00:08:43.519 --> 00:08:51.039
129
00:08:51.519 --> 00:08:54.120
130
00:08:54.159 --> 00:08:59.720
131
00:08:59.759 --> 00:09:04.399
132
00:09:04.480 --> 00:09:07.759
133
00:09:07.759 --> 00:09:10.120
134
00:09:10.159 --> 00:09:14.919
135
00:09:14.960 --> 00:09:18.799
136
00:09:18.799 --> 00:09:22.159
137
00:09:22.240 --> 00:09:24.799
138
00:09:24.840 --> 00:09:30.039
139
00:09:30.080 --> 00:09:35.039
140
00:09:35.120 --> 00:09:40.200
141
00:09:40.240 --> 00:09:42.639
142
00:09:42.720 --> 00:09:46.000
143
00:09:46.039 --> 00:09:46.720
144
00:09:48.240 --> 00:09:54.639
145
00:09:56.000 --> 00:09:58.720
146
00:09:58.759 --> 00:10:04.000
147
00:10:04.720 --> 00:10:07.120
148
00:10:07.120 --> 00:10:10.960
149
00:10:11.000 --> 00:10:17.440
150
00:10:17.480 --> 00:10:22.039
151
00:10:23.519 --> 00:10:25.919
152
00:10:25.960 --> 00:10:31.919
153
00:10:32.480 --> 00:10:34.600
154
00:10:34.679 --> 00:10:38.120
155
00:10:38.159 --> 00:10:41.720
156
00:10:41.759 --> 00:10:44.559
157
00:10:44.600 --> 00:10:47.679
158
00:10:47.799 --> 00:10:51.360
159
00:10:51.399 --> 00:10:53.639
160
00:10:53.720 --> 00:10:56.519
161
00:10:56.519 --> 00:11:01.240
162
00:11:01.279 --> 00:11:04.320
163
00:11:04.360 --> 00:11:08.960
164
00:11:09.200 --> 00:11:14.399
165
00:11:14.480 --> 00:11:18.720
166
00:11:18.759 --> 00:11:21.519
167
00:11:22.200 --> 00:11:27.840
168
00:11:27.879 --> 00:11:32.039
169
00:11:32.039 --> 00:11:37.080
170
00:11:37.120 --> 00:11:39.879
171
00:11:39.919 --> 00:11:45.559
172
00:11:45.679 --> 00:11:50.000
173
00:11:50.440 --> 00:11:54.759
174
00:11:54.799 --> 00:11:58.159
175
00:11:58.200 --> 00:12:03.960
176
00:12:04.000 --> 00:12:07.120
177
00:12:07.600 --> 00:12:09.960
178
00:12:10.159 --> 00:12:15.399
179
00:12:15.480 --> 00:12:19.960
180
00:12:20.279 --> 00:12:23.840
181
00:12:24.759 --> 00:12:30.240
182
00:12:30.279 --> 00:12:35.559
183
00:12:36.080 --> 00:12:39.559
184
00:12:39.639 --> 00:12:46.759
185
00:12:46.840 --> 00:12:56.600
186
00:12:56.840 --> 00:13:01.120
187
00:13:02.080 --> 00:13:08.759
188
00:13:08.799 --> 00:13:13.120
189
00:13:13.639 --> 00:13:19.120
190
00:13:19.240 --> 00:13:22.399
191
00:13:22.440 --> 00:13:24.279
192
00:13:24.320 --> 00:13:28.120
193
00:13:28.240 --> 00:13:32.240
194
00:13:32.279 --> 00:13:35.960
195
00:13:36.080 --> 00:13:40.960
196
00:13:40.960 --> 00:13:45.840
197
00:13:45.919 --> 00:13:50.440
198
00:13:52.919 --> 00:13:55.519
199
00:13:55.639 --> 00:14:01.840
200
00:14:02.080 --> 00:14:06.080
201
00:14:06.120 --> 00:14:08.799
202
00:14:08.879 --> 00:14:11.679
203
00:14:11.720 --> 00:14:15.200
204
00:14:15.919 --> 00:14:20.240
205
00:14:21.440 --> 00:14:24.639
206
00:14:24.759 --> 00:14:31.200
207
00:14:31.320 --> 00:14:37.639
208
00:14:37.679 --> 00:14:42.519
209
00:14:42.519 --> 00:14:45.360
210
00:14:45.440 --> 00:14:52.200
211
00:14:52.200 --> 00:14:55.000
212
00:14:55.080 --> 00:14:59.639
213
00:14:59.639 --> 00:15:02.759
214
00:15:02.840 --> 00:15:05.639
215
00:15:05.720 --> 00:15:08.480
216
00:15:08.480 --> 00:15:16.159
217
00:15:16.320 --> 00:15:22.000
218
00:15:22.080 --> 00:15:26.799
219
00:15:27.399 --> 00:15:31.679
220
00:15:31.679 --> 00:15:34.559
221
00:15:35.440 --> 00:15:38.720
222
00:15:38.879 --> 00:15:43.879
223
00:15:43.919 --> 00:15:46.279
224
00:15:46.360 --> 00:15:55.320
225
00:15:55.519 --> 00:15:59.559
226
00:15:59.559 --> 00:16:02.480
227
00:16:02.919 --> 00:16:07.639
228
00:16:07.679 --> 00:16:11.720
229
00:16:11.759 --> 00:16:15.120
230
00:16:15.200 --> 00:16:17.919
231
00:16:17.919 --> 00:16:20.240
232
00:16:20.240 --> 00:16:22.519
233
00:16:22.559 --> 00:16:25.200
234
00:16:25.240 --> 00:16:28.120
235
00:16:28.279 --> 00:16:32.519
236
00:16:32.960 --> 00:16:38.639
237
00:16:40.039 --> 00:16:43.000
238
00:16:43.000 --> 00:16:47.360
239
00:16:48.000 --> 00:16:51.720
240
00:16:51.799 --> 00:16:55.679
241
00:16:55.720 --> 00:16:59.200
242
00:16:59.240 --> 00:17:02.720
243
00:17:02.720 --> 00:17:04.759
Spotify
Apple Podcasts
Youtube Music
iHeartRadio
Spreaker
PocketCasts
YouTube
Goodpods
Amazon Music
TuneIn
Overcast
JioSaavn
Castro
RSS Feed