The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too cold.

One of the mysteries of the Martian landscape is the presence of numerous valleys and lakebeds, which appear to have been shaped by flowing water in ancient times. Simulations of what Mars might have ...

Mars looks quiet today, but new research suggests the planet’s surface still carries the rhythm of a vanished companion. Sediment patterns in an ancient lake bed point to regular rises and falls in ...