Geologically, Mars is very reminiscent of the moon. But it also looks a lot like the Earth. It all depends on who you ask.

NASA's Ingenuity helicopter wasn't just an experiment—it became a trailblazer on Mars.  Discover how this tiny helicopter shocked engineers with its groundbreaking performance and changed the future ...

NASA sees two paths for saving its beleaguered plan to retrieve materials from the Red Planet but won’t choose between them ...