Feb. 25, 2025

Asteroid 2024 YR4 Threat, Lunar Canyon Formation, and NASA Astronauts’ Early Homecoming: S28E24

Asteroid 2024 YR4 Threat, Lunar Canyon Formation, and NASA Astronauts’ Early Homecoming: S28E24
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Asteroid 2024 YR4 Threat, Lunar Canyon Formation, and NASA Astronauts’ Early Homecoming: S28E24

SpaceTime Series 28 Episode 24

The Astronomy, Space and Science News Podcast

Asteroid Impact Odds, Lunar Grand Canyons, and NASA's Stranded Astronauts

In this episode of SpaceTime, we discuss the alarming increase in the odds of asteroid 2024 YR4 impacting Earth, now estimated at 3.1% for December 22, 2032. This asteroid, measuring between 40 to 90 meters, poses a significant threat, and we delve into the implications of planetary defense strategies that could be employed to mitigate this risk.

The Origins of the Moon's Grand Canyons

We also explore new research that suggests the Moon's massive canyons, Vallis Schrodinger and Valles Plank, were carved out by asteroid impacts in a mere 10 minutes. This groundbreaking study provides insights into the Moon's geological history and will have important implications for future lunar missions, particularly the upcoming Artemis program.

NASA's Stranded Astronauts

Additionally, we cover the latest developments regarding NASA astronauts Sunita Williams and Butch Wiltmore, who have been stranded aboard the International Space Station since June 2024. With the potential for an earlier return home due to a change in SpaceX's Crew 10 mission schedule, we discuss the challenges they faced during their extended stay in orbit.

00:00 Space Time Series 28 Episode 24 for broadcast on 24 February 2025

00:49 Increased odds of asteroid 2024 YR4 impact

06:30 Implications for planetary defense strategies

12:15 The formation of lunar canyons from asteroid impacts

18:00 Insights from the Schrodinger impact basin study

22:45 NASA astronauts' potential early return to Earth

27:00 Overview of La Nina's arrival in the eastern Pacific

30:15 The implications of losing the sense of taste

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✍️ Episode References

NASA

https://www.nasa.gov (https://www.nasa.gov/)

Nature Communications

https://www.nature.com/ncomms (https://www.nature.com/ncomms) /

NOAA

https://www.noaa.gov (https://www.noaa.gov/)

Journal of the American Medical Association

https://jamanetwork.com/journals/jama (https://jamanetwork.com/journals/jama)

Journal of Vertebrate Paleontology

https://www.journals.uchicago.edu/journals/jvp (https://www.journals.uchicago.edu/journals/jvp)

Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-astronomy-science-news--2458531/support (https://www.spreaker.com/podcast/spacetime-astronomy-science-news--2458531/support?utm_source=rss&utm_medium=rss&utm_campaign=rss) .

Episode link: https://play.headliner.app/episode/25758379?utm_source=youtube

00:00 - Space Time Series 28 Episode 24 for broadcast on 24 February 2025

00:49 - Increased odds of asteroid 2024 YR4 impact

06:30 - Implications for planetary defense strategies

12:15 - The formation of lunar canyons from asteroid impacts

18:00 - Insights from the Schrodinger impact basin study

22:45 - NASA astronauts’ potential early return to Earth

WEBVTT
Kind: captions
Language: en

00:00:00.240 --> 00:00:03.110
this is spacetime series 28 episode 24


00:00:03.120 --> 00:00:05.869
for broadcast on the 24th of February


00:00:05.879 --> 00:00:09.310
2025 coming up on SpaceTime the odds


00:00:09.320 --> 00:00:11.430
narrowing for an Earth impact by the


00:00:11.440 --> 00:00:13.829
city killer asteroid looking at the


00:00:13.839 --> 00:00:16.950
origins of the moon's Grand Canyons and


00:00:16.960 --> 00:00:19.590
NASA's stranded Starliner astronauts


00:00:19.600 --> 00:00:22.150
coming home earlier than thought all


00:00:22.160 --> 00:00:25.269
that and more coming up on


00:00:25.279 --> 00:00:28.429
SpaceTime welcome to SpaceTime with


00:00:28.439 --> 00:00:38.130
steuart Gary


00:00:38.140 --> 00:00:45.430
[Music]


00:00:45.440 --> 00:00:48.790
Nessa says there's now a 3.1% chance of


00:00:48.800 --> 00:00:51.990
asteroid 2024 yr4 slamming into the


00:00:52.000 --> 00:00:54.389
Earth on December the 22nd


00:00:54.399 --> 00:00:58.430
20132 that translates to odds of 1 in32


00:00:58.440 --> 00:01:01.670
up from the 1 in 43 or 2.3% chance of an


00:01:01.680 --> 00:01:03.630
impact earlier this month and roughly


00:01:03.640 --> 00:01:05.630
three times greater than the original


00:01:05.640 --> 00:01:08.789
estimate of one in 83 or 1.2% first


00:01:08.799 --> 00:01:12.310
calculated 4 weeks ago the 40 to 90 M


00:01:12.320 --> 00:01:13.910
wide asteroid is now the most


00:01:13.920 --> 00:01:15.990
threatening space rock this big ever


00:01:16.000 --> 00:01:18.550
recorded by modern forecasting


00:01:18.560 --> 00:01:20.429
astronomers have estimated its size


00:01:20.439 --> 00:01:24.390
based on its brightness 2024 yr4 is on


00:01:24.400 --> 00:01:26.710
an elongated elliptical orbit around the


00:01:26.720 --> 00:01:29.109
sun it's currently moving away from the


00:01:29.119 --> 00:01:31.630
earth making it more difficult to track


00:01:31.640 --> 00:01:34.429
but it will be back in December 2028


00:01:34.439 --> 00:01:35.910
where scientists will get a good look at


00:01:35.920 --> 00:01:38.550
it and be able to finalize its orbit and


00:01:38.560 --> 00:01:40.789
trajectory the last time an asteroid


00:01:40.799 --> 00:01:42.670
more than 30 m wide posed such a


00:01:42.680 --> 00:01:44.950
significant risk to Earth was apus back


00:01:44.960 --> 00:01:48.389
in 2004 when it briefly had a 2.7%


00:01:48.399 --> 00:01:51.230
chance of Earth impact in 2029 a


00:01:51.240 --> 00:01:53.030
possibility later ruled out by


00:01:53.040 --> 00:01:56.670
additional observations 2024 yr4 was


00:01:56.680 --> 00:01:58.990
first detected on December the 27th last


00:01:59.000 --> 00:02:00.830
year by the old source observatory in


00:02:00.840 --> 00:02:03.429
Chile the international asteroid warning


00:02:03.439 --> 00:02:05.590
Network issued an alarm on January the


00:02:05.600 --> 00:02:08.029
29th after the impact probability cross


00:02:08.039 --> 00:02:11.270
the 1% barrier the agency says if that


00:02:11.280 --> 00:02:13.750
risk Rises to over 10% it'll issue a


00:02:13.760 --> 00:02:15.630
formal warning leading to a


00:02:15.640 --> 00:02:17.630
recommendation for all United Nation


00:02:17.640 --> 00:02:18.990
members who have territories in the


00:02:19.000 --> 00:02:20.630
potential Impact Zone to start


00:02:20.640 --> 00:02:21.990
terrestrial


00:02:22.000 --> 00:02:24.229
preparedness the potential Earth impact


00:02:24.239 --> 00:02:26.470
site lies along an arc running from the


00:02:26.480 --> 00:02:28.430
central eastern Pacific Ocean across


00:02:28.440 --> 00:02:30.589
Northern South America in the Atlantic


00:02:30.599 --> 00:02:32.790
Ocean and equatorial Africa before


00:02:32.800 --> 00:02:35.390
finally ending in Northern India


00:02:35.400 --> 00:02:37.270
Professor Fred judan from the school of


00:02:37.280 --> 00:02:39.030
Earth and planetary Sciences at curtain


00:02:39.040 --> 00:02:40.790
University says that while the odds of


00:02:40.800 --> 00:02:42.949
an impact are still incredibly low the


00:02:42.959 --> 00:02:44.869
threat is not so small that it can be


00:02:44.879 --> 00:02:47.509
easily ignored well I think the latest


00:02:47.519 --> 00:02:49.630
news is really about the increase of


00:02:49.640 --> 00:02:51.790
probability that it's going to smash on


00:02:51.800 --> 00:02:54.949
Earth and uh it's still very very low I


00:02:54.959 --> 00:02:56.750
think I've read a news somewhere that


00:02:56.760 --> 00:02:59.509
there's even a 0.3% chance it would


00:02:59.519 --> 00:03:01.630
impact the moon so it's even lower we


00:03:01.640 --> 00:03:03.390
don't know whether it's a rocky body or


00:03:03.400 --> 00:03:05.390
a rubble pile I guess one of the


00:03:05.400 --> 00:03:07.030
interesting things is issues of


00:03:07.040 --> 00:03:09.350
planetary defense now we've had the dart


00:03:09.360 --> 00:03:11.550
Mission by NASA so we know a little bit


00:03:11.560 --> 00:03:13.509
about planetary defense from an asteroid


00:03:13.519 --> 00:03:15.789
don't we yeah so that that mission was


00:03:15.799 --> 00:03:17.550
absolutely excellent I mean it really


00:03:17.560 --> 00:03:21.229
showed us that by Smashing probe into


00:03:21.239 --> 00:03:24.309
asteroid we can push them but it also


00:03:24.319 --> 00:03:27.470
show us that we don't push them a lot


00:03:27.480 --> 00:03:30.070
right so it takes time to really push an


00:03:30.080 --> 00:03:32.070
asteroid out of the way because the


00:03:32.080 --> 00:03:34.350
probe the weight of the probe is fairly


00:03:34.360 --> 00:03:36.630
low and the mass of the asteroid is


00:03:36.640 --> 00:03:39.270
really high so you need to smash mini


00:03:39.280 --> 00:03:41.949
probe if you want to deflect a beginner


00:03:41.959 --> 00:03:45.750
asteroid now in the case of yr4 it's fa


00:03:45.760 --> 00:03:49.350
small it's between 40 m and 90 M that


00:03:49.360 --> 00:03:51.429
doesn't seem very big but that could


00:03:51.439 --> 00:03:54.069
level easily a city so that's something


00:03:54.079 --> 00:03:56.869
to consider pushing it away destroying


00:03:56.879 --> 00:03:59.869
all this safety measure that people are


00:03:59.879 --> 00:04:01.670
considering and you mentioned the


00:04:01.680 --> 00:04:03.509
structure and this structure is


00:04:03.519 --> 00:04:05.710
absolutely important the structure the


00:04:05.720 --> 00:04:07.789
nature of the asteroid it's very


00:04:07.799 --> 00:04:10.990
important to know what we can do to


00:04:11.000 --> 00:04:12.869
prevent an impact let me give you an


00:04:12.879 --> 00:04:15.589
example if it's a hard Rocky body and


00:04:15.599 --> 00:04:19.030
you try to impact a big enough object or


00:04:19.040 --> 00:04:22.030
even data nuclear bomb there's a huge


00:04:22.040 --> 00:04:23.909
chance that it's going to fragment now


00:04:23.919 --> 00:04:26.310
if it's a rubble pile asterid some study


00:04:26.320 --> 00:04:28.390
we did at curtain really show that if


00:04:28.400 --> 00:04:31.029
you detonate a nuclear B not at the


00:04:31.039 --> 00:04:33.950
surface but near the surface then it


00:04:33.960 --> 00:04:35.950
would withstand the sh and be pushed


00:04:35.960 --> 00:04:38.670
away and maybe this kind of measure this


00:04:38.680 --> 00:04:41.350
kind of approach is more efficient for


00:04:41.360 --> 00:04:44.510
deflecting and steroid very quickly than


00:04:44.520 --> 00:04:47.390
impacting probe over time because in the


00:04:47.400 --> 00:04:50.590
case of yr4 it's going to come back in


00:04:50.600 --> 00:04:54.510
2028 and then again in 2032 and that's


00:04:54.520 --> 00:04:56.790
when it could potentially impact so


00:04:56.800 --> 00:04:58.990
that's a really short amount of time to


00:04:59.000 --> 00:05:01.270
be able to push it out of the way that's


00:05:01.280 --> 00:05:03.310
why it's important to consider all the


00:05:03.320 --> 00:05:05.830
technique we can use to deflect this


00:05:05.840 --> 00:05:07.950
Aster yeah I remember we did an


00:05:07.960 --> 00:05:10.070
experiment like this on a small scale we


00:05:10.080 --> 00:05:12.390
had a boulder and we had a rubble pile


00:05:12.400 --> 00:05:15.390
and we fired a 223 rifle into each of


00:05:15.400 --> 00:05:17.230
them and hit the Boulder and it moved


00:05:17.240 --> 00:05:19.270
the boulder but when the bullet hit the


00:05:19.280 --> 00:05:22.270
rubble pile it just went right through


00:05:22.280 --> 00:05:24.350
and the rubble pile stayed where it was


00:05:24.360 --> 00:05:26.189
it didn't really move the rubble pile


00:05:26.199 --> 00:05:28.390
this is absolutely correct I mean that


00:05:28.400 --> 00:05:30.110
that that's something to to really keep


00:05:30.120 --> 00:05:32.909
in mind is like well if you detonate a


00:05:32.919 --> 00:05:35.309
device at the surface you would fragment


00:05:35.319 --> 00:05:37.590
the big one and then I don't know what


00:05:37.600 --> 00:05:39.510
it would do to the rubble Pile in space


00:05:39.520 --> 00:05:41.830
but the shock wave from something that


00:05:41.840 --> 00:05:44.510
is detonated sufficiently far away you


00:05:44.520 --> 00:05:45.749
know those people they make the


00:05:45.759 --> 00:05:48.230
calculation not too close not too far


00:05:48.240 --> 00:05:51.029
very brilliant engineering and if you do


00:05:51.039 --> 00:05:53.990
that then the verble pile will be easily


00:05:54.000 --> 00:05:56.670
pushed away without theoretically


00:05:56.680 --> 00:05:58.510
fragmenting it because obviously if you


00:05:58.520 --> 00:06:01.270
fragment the asteroid you transform a


00:06:01.280 --> 00:06:04.270
single ball into many many pieces it's


00:06:04.280 --> 00:06:06.510
like instead of a bullet yeah instead of


00:06:06.520 --> 00:06:09.749
a bullet now you got a shotgun spread so


00:06:09.759 --> 00:06:12.270
if it was supposed to be the ocean and


00:06:12.280 --> 00:06:14.150
now you fragment it and now it's going


00:06:14.160 --> 00:06:17.950
to rain on every cities on Earth uh well


00:06:17.960 --> 00:06:20.550
I mean you know not every along the fly


00:06:20.560 --> 00:06:22.830
path yeah yeah yeah along the fly path


00:06:22.840 --> 00:06:24.790
exactly then people are not going to be


00:06:24.800 --> 00:06:26.830
really happy you know less damage but


00:06:26.840 --> 00:06:28.950
still a lot of damage whereas before


00:06:28.960 --> 00:06:30.430
they would have been nothing for this


00:06:30.440 --> 00:06:32.390
particular City so there's really


00:06:32.400 --> 00:06:34.510
ethical concern like that to consider


00:06:34.520 --> 00:06:37.029
let's assume it's a solid body that's


00:06:37.039 --> 00:06:38.309
not going to wear burst that's going to


00:06:38.319 --> 00:06:39.589
cut through the atmosphere it's going to


00:06:39.599 --> 00:06:41.070
go all the way to the surface what sort


00:06:41.080 --> 00:06:43.309
of damage would something that's say 90


00:06:43.319 --> 00:06:45.469
M across do on the planet well that's


00:06:45.479 --> 00:06:47.950
why we call it the city killer not the


00:06:47.960 --> 00:06:50.790
country killer or or the Planet Killer


00:06:50.800 --> 00:06:53.110
because it's it's fairly small actually


00:06:53.120 --> 00:06:55.309
if people want to imagine what it would


00:06:55.319 --> 00:06:58.390
do it's like detonating a powerful


00:06:58.400 --> 00:07:00.749
nuclear bomb it it's the same an impact


00:07:00.759 --> 00:07:02.909
is an explosion it's not really like


00:07:02.919 --> 00:07:05.230
digging a hole it's just an explosion


00:07:05.240 --> 00:07:07.670
and well unfortunately you know in our


00:07:07.680 --> 00:07:10.070
history of humankind we detonate a lot


00:07:10.080 --> 00:07:12.189
of weapon as a test everywhere on the


00:07:12.199 --> 00:07:14.150
planet and uh you know depending where


00:07:14.160 --> 00:07:16.070
it's done it just leave a hole in the


00:07:16.080 --> 00:07:17.909
ground and the hole it would live it


00:07:17.919 --> 00:07:20.110
would be the size of Arizona crater the


00:07:20.120 --> 00:07:22.950
baringer crater which is about 1 kilm


00:07:22.960 --> 00:07:25.390
wide so that's not that big however a


00:07:25.400 --> 00:07:27.830
city would be completely leveled so here


00:07:27.840 --> 00:07:30.830
I I live in purse and we have roughly 2


00:07:30.840 --> 00:07:33.150
million inhabitant and the city would be


00:07:33.160 --> 00:07:34.909
completely destroyed now would have been


00:07:34.919 --> 00:07:36.990
a bit of warning before so people can


00:07:37.000 --> 00:07:39.150
evacuate but still it's really not nice


00:07:39.160 --> 00:07:41.390
to lose a beautiful city like this if


00:07:41.400 --> 00:07:44.430
you want but considering the bigger


00:07:44.440 --> 00:07:46.510
implication not much I mean you know


00:07:46.520 --> 00:07:48.110
it's not like you got to have a nuclear


00:07:48.120 --> 00:07:49.710
winter or anything like that plus


00:07:49.720 --> 00:07:51.710
something that people need to consider


00:07:51.720 --> 00:07:55.070
Earth is covered by about 70% water so


00:07:55.080 --> 00:07:57.070
you get 70% chance he going to land on


00:07:57.080 --> 00:08:00.550
the ocean and the land is about 2%


00:08:00.560 --> 00:08:03.790
inhabited in term of of cities I mean


00:08:03.800 --> 00:08:05.110
you know of course there's people living


00:08:05.120 --> 00:08:07.029
in Bush and stuff like that but in the


00:08:07.039 --> 00:08:09.270
term of city it's about 2% coverage so


00:08:09.280 --> 00:08:11.309
that's not there's very low Chance is


00:08:11.319 --> 00:08:13.270
going to impact on a city much more like


00:08:13.280 --> 00:08:14.950
in the outback or something like that


00:08:14.960 --> 00:08:16.909
well not that it's on the flat plan but


00:08:16.919 --> 00:08:19.309
like you you know related to Australia


00:08:19.319 --> 00:08:21.189
so the chance is really small and I


00:08:21.199 --> 00:08:23.189
would say for scientists you know we we


00:08:23.199 --> 00:08:25.110
almost would hope that it would impact


00:08:25.120 --> 00:08:27.430
so we could study how things happen


00:08:27.440 --> 00:08:28.909
because there's going to be so little


00:08:28.919 --> 00:08:30.869
consequence but again in middle of the


00:08:30.879 --> 00:08:33.350
ocean it's safe in the outback it's safe


00:08:33.360 --> 00:08:35.550
unfortunately if it's on a city that's


00:08:35.560 --> 00:08:37.269
really not good news and that's why we


00:08:37.279 --> 00:08:40.389
need to learn to deflect Aster maybe not


00:08:40.399 --> 00:08:42.990
for this particular case but you know


00:08:43.000 --> 00:08:45.350
for the training purpose not waiting the


00:08:45.360 --> 00:08:47.630
absolute that minute to know how to do


00:08:47.640 --> 00:08:51.310
something and our first test is you know


00:08:51.320 --> 00:08:52.990
is our first practice that's not


00:08:53.000 --> 00:08:55.269
reasonable I would think so using this


00:08:55.279 --> 00:08:58.030
opportunity maybe trying to deflect this


00:08:58.040 --> 00:09:00.030
one that would be interesting and I


00:09:00.040 --> 00:09:03.110
think uh I might be wrong but I think I


00:09:03.120 --> 00:09:05.910
read online that China is interested by


00:09:05.920 --> 00:09:07.870
the prospect of doing that having their


00:09:07.880 --> 00:09:11.350
own dart Mission using another asteroid


00:09:11.360 --> 00:09:13.509
and maybe this one as well so we'll see


00:09:13.519 --> 00:09:15.190
how it goes the other option of course


00:09:15.200 --> 00:09:17.230
is that it is the rubble pile and that


00:09:17.240 --> 00:09:19.870
makes me think more of the tangus like


00:09:19.880 --> 00:09:22.110
event I know what you're saying uh like


00:09:22.120 --> 00:09:24.470
like a big explosion in the sky it's


00:09:24.480 --> 00:09:27.550
still like tangus or chela blinks chela


00:09:27.560 --> 00:09:29.670
blinks was really small it was a small


00:09:29.680 --> 00:09:32.230
was a 10 m in diameter but still you


00:09:32.240 --> 00:09:34.350
know broke a lot of Windows and things


00:09:34.360 --> 00:09:36.509
like that but impact a St like that


00:09:36.519 --> 00:09:38.949
explosion it's really a exponential


00:09:38.959 --> 00:09:42.630
scale so 90 m is not nine times more


00:09:42.640 --> 00:09:45.230
powerful is so many more time powerful


00:09:45.240 --> 00:09:48.069
like I said you know yes 500 time


00:09:48.079 --> 00:09:49.910
yoshima or something like that so that


00:09:49.920 --> 00:09:52.630
that's really decent Rubble pile or not


00:09:52.640 --> 00:09:54.910
I think that would be the same thing if


00:09:54.920 --> 00:09:57.350
the explosion touch the ground okay it's


00:09:57.360 --> 00:09:59.550
one thing but if it explodes in midair


00:09:59.560 --> 00:10:01.630
with the power of nuclear bomb that has


00:10:01.640 --> 00:10:03.750
exactly the same effect on a city that


00:10:03.760 --> 00:10:06.350
still Level it the same way so Rubble


00:10:06.360 --> 00:10:08.630
pile or not it's more for how we going


00:10:08.640 --> 00:10:10.910
to deflect it which is important rather


00:10:10.920 --> 00:10:12.670
than how it's going to impact on Earth


00:10:12.680 --> 00:10:14.509
in my opinion that's Professor Fred


00:10:14.519 --> 00:10:16.190
Jordan from the school of Earth and


00:10:16.200 --> 00:10:19.350
planetary Sciences at curtain University


00:10:19.360 --> 00:10:22.829
and this SpaceTime still to come looking


00:10:22.839 --> 00:10:24.630
at the origins of the moon's Grand


00:10:24.640 --> 00:10:27.389
Canyons and nessa's Stranded astronauts


00:10:27.399 --> 00:10:29.030
now likely to come home a little bit


00:10:29.040 --> 00:10:31.310
early ier than last planned all that and


00:10:31.320 --> 00:10:37.210
more still to come on


00:10:37.220 --> 00:10:48.509
[Music]


00:10:48.519 --> 00:10:51.110
SpaceTime a new study has concluded that


00:10:51.120 --> 00:10:53.629
two gigantic Canyons on the moon were


00:10:53.639 --> 00:10:55.790
most likely carved out by streams of


00:10:55.800 --> 00:10:58.150
impacting asteroids over a space of just


00:10:58.160 --> 00:11:00.829
10 minutes the new findings reported in


00:11:00.839 --> 00:11:02.710
the journal Nature Communications are


00:11:02.720 --> 00:11:05.069
providing fresh insights into an area of


00:11:05.079 --> 00:11:06.829
the Moon which will be crucial in


00:11:06.839 --> 00:11:09.829
upcoming lunar missions the Schrodinger


00:11:09.839 --> 00:11:12.190
impact Basin with an estimated age of


00:11:12.200 --> 00:11:14.829
3.81 billion years is located in the


00:11:14.839 --> 00:11:18.230
outer margin of the moon's 2,400 km


00:11:18.240 --> 00:11:21.269
diameter South Pole atken Basin that's


00:11:21.279 --> 00:11:23.110
one of the largest impact basins in the


00:11:23.120 --> 00:11:25.629
solar system the Schrodinger Basin


00:11:25.639 --> 00:11:27.750
itself is surrounded by canyons and


00:11:27.760 --> 00:11:30.310
Ravines created by by streaks of Rocky


00:11:30.320 --> 00:11:32.350
debris known as ejector rays that were


00:11:32.360 --> 00:11:35.389
flung out during an impact event two


00:11:35.399 --> 00:11:37.629
spectacular canyons in the complex are


00:11:37.639 --> 00:11:40.790
valis Schrodinger and valis plank these


00:11:40.800 --> 00:11:42.829
massive canyons are comparable in size


00:11:42.839 --> 00:11:44.750
to North America's Grand Canyon with


00:11:44.760 --> 00:11:47.790
Schrodinger measuring some 270 km long


00:11:47.800 --> 00:11:50.750
and 2.7 km deep while plank is even


00:11:50.760 --> 00:11:55.790
larger at 280 km long and 3.5 km deep


00:11:55.800 --> 00:11:57.350
however the exact nature of their


00:11:57.360 --> 00:11:59.230
formation had always been unclear on


00:11:59.240 --> 00:12:01.870
until now the new research is based on


00:12:01.880 --> 00:12:03.790
images of the moon's surface used to


00:12:03.800 --> 00:12:06.110
generate new topographic maps which were


00:12:06.120 --> 00:12:08.069
then used to calculate flow directions


00:12:08.079 --> 00:12:10.269
and speed of the debris ejected during


00:12:10.279 --> 00:12:12.750
the canyon forming impact event and


00:12:12.760 --> 00:12:14.949
these data could then be used to model


00:12:14.959 --> 00:12:17.629
how the ejector rays were formed the


00:12:17.639 --> 00:12:19.430
study's authors proposed that these


00:12:19.440 --> 00:12:21.670
lunar Grand Canyons were carved out of


00:12:21.680 --> 00:12:24.230
the lunar crust in less than 10 minutes


00:12:24.240 --> 00:12:26.189
by ejector traveling at speeds of


00:12:26.199 --> 00:12:29.870
between 0.95 and 1.28 km


00:12:29.880 --> 00:12:32.430
m/s they calculate that the energy


00:12:32.440 --> 00:12:34.389
needed to create these massive Canyons


00:12:34.399 --> 00:12:36.389
would have been over 130 times the


00:12:36.399 --> 00:12:38.150
energy of all the current Global


00:12:38.160 --> 00:12:41.110
inventory of nuclear weapons rather than


00:12:41.120 --> 00:12:42.910
flying out symmetrically the work


00:12:42.920 --> 00:12:44.310
suggest that the majority of the


00:12:44.320 --> 00:12:46.389
excavated debris was asymmetrically


00:12:46.399 --> 00:12:48.550
distributed away from the poles the


00:12:48.560 --> 00:12:50.829
shrer impact Basin is close to the


00:12:50.839 --> 00:12:52.710
exploration zone for the upcoming


00:12:52.720 --> 00:12:55.550
Artemus man moon mission so these


00:12:55.560 --> 00:12:56.790
findings will have important


00:12:56.800 --> 00:12:59.189
implications for future Luna missions


00:12:59.199 --> 00:13:00.750
possibly offering insights into the


00:13:00.760 --> 00:13:03.949
composition of potential Landing zones


00:13:03.959 --> 00:13:07.430
this SpaceTime still to come Nas's


00:13:07.440 --> 00:13:09.710
stranded astronauts Cy Williams and


00:13:09.720 --> 00:13:11.550
Butch Wilmore who have been stuck aboard


00:13:11.560 --> 00:13:13.430
the International Space Station since


00:13:13.440 --> 00:13:15.550
June last year could be returning home


00:13:15.560 --> 00:13:17.790
earlier than currently planned and later


00:13:17.800 --> 00:13:19.910
in the science report it's official


00:13:19.920 --> 00:13:22.629
linia has finally arrived in the Eastern


00:13:22.639 --> 00:13:25.030
Pacific Ocean all that and more still to


00:13:25.040 --> 00:13:39.180
come on SpaceTime


00:13:39.190 --> 00:13:42.269
[Music]


00:13:42.279 --> 00:13:44.150
Nessa astronauts Sunni Williams and


00:13:44.160 --> 00:13:46.069
Butch Wilmore have been stranded aboard


00:13:46.079 --> 00:13:47.750
the International Space Station since


00:13:47.760 --> 00:13:49.710
June last year could end up returning


00:13:49.720 --> 00:13:52.110
home earlier than currently planned


00:13:52.120 --> 00:13:53.829
that's because SpaceX is looking at


00:13:53.839 --> 00:13:55.749
swapping the dragon capsules for its


00:13:55.759 --> 00:13:57.910
next twom man missions to the orbiting


00:13:57.920 --> 00:14:00.350
Outpost the that would see the crew 10


00:14:00.360 --> 00:14:02.749
Mission launch on March 12 two weeks


00:14:02.759 --> 00:14:05.350
earlier than previously slated Wilmore


00:14:05.360 --> 00:14:07.069
and Williams have now been stranded on


00:14:07.079 --> 00:14:09.389
the space station for over 8 months on


00:14:09.399 --> 00:14:11.110
what should have been an 8 to 10day


00:14:11.120 --> 00:14:12.990
mission after problems developed with


00:14:13.000 --> 00:14:14.870
the thrusters aboard their Boeing styl


00:14:14.880 --> 00:14:16.749
on a spacecraft which was undertaking


00:14:16.759 --> 00:14:19.310
its first man test flight NASA were


00:14:19.320 --> 00:14:21.030
concerned about safety issues with the


00:14:21.040 --> 00:14:23.310
spacecraft and Boeing eventually decided


00:14:23.320 --> 00:14:25.230
to return the spacecraft to Earth


00:14:25.240 --> 00:14:27.870
unmanned it ended up safely landing on


00:14:27.880 --> 00:14:30.550
the Whit Sand Missile range after the


00:14:30.560 --> 00:14:32.829
new crew 10 arrives on station Wilmore


00:14:32.839 --> 00:14:34.389
and Williams will return to Earth with


00:14:34.399 --> 00:14:36.310
the current crew 9 team aboard their


00:14:36.320 --> 00:14:38.069
dragon capture which will be fitted with


00:14:38.079 --> 00:14:40.150
two additional couches for the


00:14:40.160 --> 00:14:42.200
astronauts this is


00:14:42.210 --> 00:14:57.069
[Music]


00:14:57.079 --> 00:14:59.310
spacetime and time now to take a a brief


00:14:59.320 --> 00:15:00.710
look at some of the other stories making


00:15:00.720 --> 00:15:02.870
news in science this week with a science


00:15:02.880 --> 00:15:06.350
report well after 7 months of waiting L


00:15:06.360 --> 00:15:08.430
the cooler and wetter sister of El Nino


00:15:08.440 --> 00:15:10.350
has finally arrived in the Eastern


00:15:10.360 --> 00:15:13.150
Pacific Ocean however a report by Noah


00:15:13.160 --> 00:15:14.310
the national oceanographic and


00:15:14.320 --> 00:15:15.990
Atmospheric administration's climate


00:15:16.000 --> 00:15:18.269
Prediction Center has warned that Lenin


00:15:18.279 --> 00:15:20.350
may not stick around for very long with


00:15:20.360 --> 00:15:22.430
the Pacific likely to return to neutral


00:15:22.440 --> 00:15:25.310
conditions either next month or in April


00:15:25.320 --> 00:15:27.110
part of the elino Southern oscillation


00:15:27.120 --> 00:15:29.550
or Enzo cycle Lenin appears when


00:15:29.560 --> 00:15:32.189
energized easterly Trade Winds intensify


00:15:32.199 --> 00:15:34.030
the upwelling of cooler water from the


00:15:34.040 --> 00:15:36.030
depths of the Eastern tropical Pacific


00:15:36.040 --> 00:15:38.069
causing a large scale cooling of surface


00:15:38.079 --> 00:15:39.470
waters in the eastern and Central


00:15:39.480 --> 00:15:41.949
Pacific Ocean near the equator the


00:15:41.959 --> 00:15:43.910
stronger than usual Trade Winds also


00:15:43.920 --> 00:15:46.189
push warmer equator Waters westwards


00:15:46.199 --> 00:15:48.670
towards Australia and Asia and this


00:15:48.680 --> 00:15:50.389
dramatic cooling of the ocean surface


00:15:50.399 --> 00:15:52.309
layers affects the Atmosphere by


00:15:52.319 --> 00:15:54.550
modifying moisture content right across


00:15:54.560 --> 00:15:57.350
the Pacific the new report has confirmed


00:15:57.360 --> 00:16:00.470
that Lin conditions are now present it


00:16:00.480 --> 00:16:03.110
measured sea surface temperature 0.7 de


00:16:03.120 --> 00:16:05.269
C below average in an area of the


00:16:05.279 --> 00:16:07.910
tropical Pacific known as the Nino 3.4


00:16:07.920 --> 00:16:10.230
region and the signature of Lenin is


00:16:10.240 --> 00:16:11.829
also visible in the Central and Eastern


00:16:11.839 --> 00:16:13.749
Pacific Ocean as areas of lower than


00:16:13.759 --> 00:16:15.470
average water levels that's because


00:16:15.480 --> 00:16:17.470
cooler water contracts lowering sea


00:16:17.480 --> 00:16:20.590
levels conversely warmer water expands


00:16:20.600 --> 00:16:23.350
increasing them linia causes shifts in


00:16:23.360 --> 00:16:25.470
the path of mid latitude jet streams in


00:16:25.480 --> 00:16:27.749
ways that intensify rainfall in some


00:16:27.759 --> 00:16:30.189
regions and bring drought to others in


00:16:30.199 --> 00:16:32.230
the Western Pacific for example rainfall


00:16:32.240 --> 00:16:34.269
usually increases over Australia and


00:16:34.279 --> 00:16:36.550
Indonesia clouds and rainfall become


00:16:36.560 --> 00:16:38.069
more sporadic over the Central and


00:16:38.079 --> 00:16:40.230
Eastern Pacific Ocean which can lead to


00:16:40.240 --> 00:16:42.949
dry conditions in Brazil Argentina and


00:16:42.959 --> 00:16:45.269
other parts of South America and wter


00:16:45.279 --> 00:16:47.749
conditions over Central America in North


00:16:47.759 --> 00:16:49.590
America cooler and stormier conditions


00:16:49.600 --> 00:16:50.990
often sit in across the Pacific


00:16:51.000 --> 00:16:52.870
Northwest while the weather typically


00:16:52.880 --> 00:16:54.870
becomes warmer and drier across the


00:16:54.880 --> 00:16:56.710
Southern United States and across


00:16:56.720 --> 00:16:59.309
northern Mexico


00:16:59.319 --> 00:17:01.550
a new study warns that if you lose your


00:17:01.560 --> 00:17:03.870
sense of smell or taste in adulthood


00:17:03.880 --> 00:17:05.949
especially for saltiness and sourness


00:17:05.959 --> 00:17:08.230
you may well be a risk of dying


00:17:08.240 --> 00:17:10.549
prematurely the findings reported in the


00:17:10.559 --> 00:17:11.909
Journal of the American Medical


00:17:11.919 --> 00:17:15.069
Association followed 7,340 people for


00:17:15.079 --> 00:17:18.590
around 6 to 7 years 662 of whom reported


00:17:18.600 --> 00:17:21.110
losing their sense of taste now during


00:17:21.120 --> 00:17:23.829
the study period 1,1 of those


00:17:23.839 --> 00:17:25.990
participating died resulting in a


00:17:26.000 --> 00:17:28.909
background chance of dying of 14% or


00:17:28.919 --> 00:17:31.270
around one in seven people but for those


00:17:31.280 --> 00:17:33.070
who lost their sense of taste the risk


00:17:33.080 --> 00:17:34.870
of dying during the study period was


00:17:34.880 --> 00:17:38.590
around 47% higher or around 1 in five


00:17:38.600 --> 00:17:40.549
the biggest increases in death risk were


00:17:40.559 --> 00:17:42.230
among those who stopped being able to


00:17:42.240 --> 00:17:44.870
sense salty tastes as well as among men


00:17:44.880 --> 00:17:46.830
who stopped being able to taste sourness


00:17:46.840 --> 00:17:48.470
and among women who sto being able to


00:17:48.480 --> 00:17:51.190
taste bitterness and that increased risk


00:17:51.200 --> 00:17:53.230
of death was seen even among people who


00:17:53.240 --> 00:17:54.870
had lost their sense of taste but whose


00:17:54.880 --> 00:17:58.310
sense of smell had remained intact so it


00:17:58.320 --> 00:18:00.230
seems although it's yet to be proven


00:18:00.240 --> 00:18:02.590
that a loss in taste could serve as a


00:18:02.600 --> 00:18:04.549
simple way of scanning high-risk


00:18:04.559 --> 00:18:06.710
populations in order to determine who's


00:18:06.720 --> 00:18:09.549
at risk of dying prematurely now all


00:18:09.559 --> 00:18:11.470
we've got to do is work out why the


00:18:11.480 --> 00:18:13.789
association seems to be


00:18:13.799 --> 00:18:16.510
there paleontologists have Rewritten the


00:18:16.520 --> 00:18:18.750
evolution of dinosaurs after discovering


00:18:18.760 --> 00:18:20.669
fossils of the world's oldest known Mega


00:18:20.679 --> 00:18:22.909
raptoid and the first evidence of


00:18:22.919 --> 00:18:26.310
karadon Sids in Australia the findings


00:18:26.320 --> 00:18:27.669
reported in the Journal of vertebrate


00:18:27.679 --> 00:18:29.909
paleontology has has changed the history


00:18:29.919 --> 00:18:32.149
of theropod dinosaurs uncovering a


00:18:32.159 --> 00:18:34.789
predator hierarchy unique to Cretaceous


00:18:34.799 --> 00:18:37.350
Australia the research describes five


00:18:37.360 --> 00:18:39.190
therapod fossils discovered along


00:18:39.200 --> 00:18:40.909
Victorious Coastline Unearthed in the


00:18:40.919 --> 00:18:43.870
upper stres Lei group between 121.4 and


00:18:43.880 --> 00:18:46.710
118 million years ago and from the umel


00:18:46.720 --> 00:18:49.590
formation on the Otway Coast between 113


00:18:49.600 --> 00:18:52.909
and 108 million years ago these fossils


00:18:52.919 --> 00:18:55.190
are offering scientists new insights


00:18:55.200 --> 00:18:58.110
into Victoria's ancient ecosystems it


00:18:58.120 --> 00:19:00.870
was a time dominated by large powerful 6


00:19:00.880 --> 00:19:04.230
to 7 m long mear Rapids smaller 2 to 4 M


00:19:04.240 --> 00:19:07.390
long karadon SIDS and small agile meter


00:19:07.400 --> 00:19:10.110
long Southern Raptors the discovery also


00:19:10.120 --> 00:19:12.510
shows how Victorious Predator hierarchy


00:19:12.520 --> 00:19:15.070
diverge from South America where karadon


00:19:15.080 --> 00:19:17.390
aaids reach Tyrannosaurus Rex likee


00:19:17.400 --> 00:19:20.789
sizes up to 13 M toing over the mega


00:19:20.799 --> 00:19:23.549
raptoid but in Victoria the roles were


00:19:23.559 --> 00:19:25.950
reversed highlighting the uniqueness of


00:19:25.960 --> 00:19:29.710
Australia's Cretaceous ecosystem


00:19:29.720 --> 00:19:31.390
a fraudster who claimed to be able to


00:19:31.400 --> 00:19:33.270
cure a range of illnesses using a


00:19:33.280 --> 00:19:35.230
so-called slapping therapy has been


00:19:35.240 --> 00:19:37.669
jailed for 10 years in the UK after one


00:19:37.679 --> 00:19:40.390
of his patients died Tim mum from


00:19:40.400 --> 00:19:42.310
Australian skeptic says the con man had


00:19:42.320 --> 00:19:44.390
used the same scam in Australia where


00:19:44.400 --> 00:19:46.390
another patient died sling therapy is


00:19:46.400 --> 00:19:48.789
one of those treatments for disease Etc


00:19:48.799 --> 00:19:50.630
which people make up oh I've got a good


00:19:50.640 --> 00:19:52.270
idea maybe we should try this there is


00:19:52.280 --> 00:19:54.110
something close to it but not quite the


00:19:54.120 --> 00:19:55.350
same has been around a while called


00:19:55.360 --> 00:19:57.110
tapping therapy you tap parts of the


00:19:57.120 --> 00:19:59.390
body just tapping with sort of like two


00:19:59.400 --> 00:20:01.070
fingers and that's supposed to help your


00:20:01.080 --> 00:20:02.549
health no evidence of that but there's


00:20:02.559 --> 00:20:03.990
the one which is a lot more serious than


00:20:04.000 --> 00:20:06.149
that it's slapping as in literally


00:20:06.159 --> 00:20:07.990
slapping the face and slapping the body


00:20:08.000 --> 00:20:09.909
hard and it's sort of developed by a


00:20:09.919 --> 00:20:12.750
Chinese fellow named honi XO and he was


00:20:12.760 --> 00:20:15.350
doing it in the UK he came to Australia


00:20:15.360 --> 00:20:17.470
and was doing it there what He suggests


00:20:17.480 --> 00:20:18.870
is is that this is better than


00:20:18.880 --> 00:20:20.789
medication this has a real effect he


00:20:20.799 --> 00:20:22.270
says and it's better than medication and


00:20:22.280 --> 00:20:24.710
in some instances specific instances


00:20:24.720 --> 00:20:27.110
people who need insulin have been told


00:20:27.120 --> 00:20:28.750
not to take it and when you don't take


00:20:28.760 --> 00:20:30.669
insulin and you have a bad case of


00:20:30.679 --> 00:20:32.470
diabetes it can have immediate or very


00:20:32.480 --> 00:20:34.710
short almost instantaneous effects and


00:20:34.720 --> 00:20:36.230
what happens is that if you continue not


00:20:36.240 --> 00:20:37.630
to use it it can be fatal and that's


00:20:37.640 --> 00:20:39.230
exactly what happened in Australia with


00:20:39.240 --> 00:20:41.630
a young lad I think was 10 years old his


00:20:41.640 --> 00:20:42.909
parents were going through the slapping


00:20:42.919 --> 00:20:44.270
I don't know if the kid was but the


00:20:44.280 --> 00:20:45.830
parents wereth and this person was


00:20:45.840 --> 00:20:47.789
suggesting don't take insulin it's bad


00:20:47.799 --> 00:20:49.549
for you the slapping will do all the


00:20:49.559 --> 00:20:51.190
things you needs to do so they stopped


00:20:51.200 --> 00:20:52.669
the insulin for the kid and then pretty


00:20:52.679 --> 00:20:54.350
soon within a few days he was rushed off


00:20:54.360 --> 00:20:55.950
the hospital and he died in a most


00:20:55.960 --> 00:20:57.950
agonizing horrible way you start off


00:20:57.960 --> 00:21:00.669
vomiting that coughing up bile all sorts


00:21:00.679 --> 00:21:02.390
of terrible things happened so he was


00:21:02.400 --> 00:21:04.470
charged in Australia he was found guilty


00:21:04.480 --> 00:21:06.710
sentenced for 10 years but he got off on


00:21:06.720 --> 00:21:08.750
appeal mainly because of of legal


00:21:08.760 --> 00:21:10.350
technicality not because he was not


00:21:10.360 --> 00:21:11.990
guilty of slapping in the way but just


00:21:12.000 --> 00:21:14.269
that saying the trial wasn't exactly as


00:21:14.279 --> 00:21:15.430
it should have been and therefore


00:21:15.440 --> 00:21:16.750
they're going to have a retrial but in


00:21:16.760 --> 00:21:18.590
the meantime he had actually moved to


00:21:18.600 --> 00:21:19.990
England and was doing the same thing


00:21:20.000 --> 00:21:21.269
there and with the same result of


00:21:21.279 --> 00:21:22.950
another older woman there who was


00:21:22.960 --> 00:21:25.390
suffering from diabetes and she thought


00:21:25.400 --> 00:21:27.230
he was a messenger from God which is the


00:21:27.240 --> 00:21:29.430
way he portrays himself and and same


00:21:29.440 --> 00:21:32.230
problem insulin stopped and dies in in a


00:21:32.240 --> 00:21:34.710
terribly agonizing way so he's moved


00:21:34.720 --> 00:21:36.470
around from place to place and doing the


00:21:36.480 --> 00:21:38.070
same sort of thing and now been thrown


00:21:38.080 --> 00:21:40.110
in jail in the UK sounds like a silly


00:21:40.120 --> 00:21:41.310
thing seconding someone for medical


00:21:41.320 --> 00:21:42.909
reasons yeah you get a red cheek and


00:21:42.919 --> 00:21:44.630
might be a bit painful to you know what


00:21:44.640 --> 00:21:46.230
harm can it do well it can kill you


00:21:46.240 --> 00:21:51.200
that's Tim mum from Australian Skeptics


00:21:51.210 --> 00:22:04.470
[Music]


00:22:04.480 --> 00:22:07.350
and that's the show for now SpaceTime is


00:22:07.360 --> 00:22:09.190
available every Monday Wednesday and


00:22:09.200 --> 00:22:11.750
Friday through Apple podcasts iTunes


00:22:11.760 --> 00:22:14.669
Stitcher Google podcast pocketcasts


00:22:14.679 --> 00:22:18.750
Spotify acast Amazon music bites.com


00:22:18.760 --> 00:22:21.549
SoundCloud YouTube your favorite podcast


00:22:21.559 --> 00:22:23.789
download provider and from SpaceTime


00:22:23.799 --> 00:22:27.029
withth Stewart gar.com space time's also


00:22:27.039 --> 00:22:28.710
broadcast through the National Science


00:22:28.720 --> 00:22:31.149
foundation on science Zone Radio and on


00:22:31.159 --> 00:22:34.310
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Stewart gary.com for full details you've


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Gary this has been another quality


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