It’s hard to imagine that the cold, dusty, and desolate planet Mars once looked very different. Some 4 billion years ago, a thick atmosphere is thought to have protected its surface from damaging ...

A new study has examined a topological map of Mars and has suggested that the Red Planet was once subjected to thousands of "supervolcano" eruptions over the course of millions of years. The study was ...

Global map of Mars with overlaid topography indicating areas with significant seasonal variations in hydrogen content during northern spring (top) and fall (bottom). Green (red) represents increase ...