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Photos from NASA’s Curiosity rover suggest Mars had more water for longer than previously thought
euronews (in English)
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27/03/2024
The Curiosity rover has been exploring Mars' Gale Crater for more than a decade, analysing the minerals on its surface.
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00:00
[MUSIC PLAYING]
00:03
We have this sandstone, which represents migrating dunes
00:26
deposited onto the side of it.
00:28
So they must be the youngest thing,
00:30
or one of the youngest things in the crater.
00:33
Within that sandstone, we find these structures
00:36
which cross-cut them, which are evidence of water.
00:39
So they must be one of the youngest things
00:41
to happen in the crater, which therefore means
00:44
we have these structures which were formed by water,
00:48
are one of the latest things in the crater.
00:50
Therefore, there must have been water more recently
00:56
within the crater than we previously thought.
00:59
[MUSIC PLAYING]
01:02
You understand that there was water
01:10
in Mars' early history.
01:11
But then as you go from the start of the Hesperian,
01:16
so 3.7 billion years ago, towards 3 billion years ago,
01:20
Mars dried out.
01:21
And that's round about the same time
01:23
that life evolved on Earth.
01:26
And we think that's round about the same time
01:29
that life could have existed on Mars as well.
01:33
And what we found by looking at these rocks
01:35
is that there was abundant water on the surface of Mars
01:38
much later than we expected.
01:40
[MUSIC PLAYING]
01:50
Similar conditions existed on Mars at the same time
01:54
as that on Earth.
01:56
And it would be reasonable to believe that life would
01:59
potentially evolve on Mars.
02:01
But then it would need more time to evolve into a state
02:06
where it could leave a impression in the rock record.
02:10
And by us identifying this water later in Gale Crater's
02:15
infilling history, it pushes back that window
02:19
where the opportunity that life could evolve and be
02:23
preserved in the rock record.
02:24
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02:27
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02:31
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02:35
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02:38
(upbeat music)
02:41
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