An artist rendering of what recent research suggests
Mars might have looked like around 4 billion years ago, when most researchers
think the planet was considerably warmer than it is today
After six years of planetary observations,
scientists at NASA
say they have found convincing new evidence that ancient Mars
had an ocean.
It
was probably the size of the Arctic Ocean, larger than previously estimated, the
researchers reported on Thursday. The body of water spread across the low-lying
plain of the planet’s northern hemisphere for millions of years, they said...
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