Mars, which we now know is arid and dusty, while punishing radiation levels. However, as the science correspondent tells Nicolas Davis Madeleine Vinolai, two new studies add to the idea that billions of years were the red planet a more moisture place. Nicolas explains the reason why researchers believed that it was once home to sandy beaches, and what study is looking at the type of rust on this planet for its wet past, and what this might tell us about the ability of the previous Mars
