Tiny Gases Hold Clues to Planetary Atmospheres

A mystery of the early Earth — why the planet wasn’t frozen despite a weak young sun — lead scientists to re-evaluate what a habitable planet might look like and new results from the Curiosity rover show Mars may have been a friendlier place once upon a time. The answers lie in the atmosphere! Learn more at the EGU blog!

Source: Wikimedia Commons
Source: Wikimedia Commons
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