"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was fainter early on." New research suggests that temperatures on ancient Mars ...

It also poses important questions about the search for alien life on Mars. To date, NASA has focused its investigations on ancient waterways on Mars. The Perseverance rover, for example ...

NASA's Perseverance rover has uncovered a treasure trove of diverse and intriguing rocks while exploring an ancient river ...