Moruroa clay provides insights into surface of Mars | Pacific Beat

Over the past decade astronomers studying Mars believed that certain clay deposits on the Red Planet's surface could only have been left by large bodies of water.

But recently a group of researchers studying similar clay from Moruroa Atoll found it could form without water, and with cooling magma instead.

The conclusion: Mars may not have been as wet as we once thought.

Presenter:Helene Hofman

Speaker: Alain Meunier, University of Poitiers in France