What happened to Mars's water? New study suggests most was trapped in underground rocks
Posted
TueTuesday 16
updated
WedWednesday 17
MarMarch 2021 at 2:35am
The early Martian environment (right), believed to contain liquid water and a thicker atmosphere, is a world away from the cold, dry environment of Mars today (left).
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Some 4 billion years ago, Earth and Mars were young, warm and wet. If they weren't Solar System twins, they were certainly siblings.
Key points:
Much of Mars's water has disappeared since the planet formed
Planetary scientists suspect most was split into oxygen and hydrogen in the atmosphere, and the hydrogen lost to space