New Mars rover discovery hints at life, but we’re not there yet

NASA's Mars missions have provided mankind with a wealth of knowledge about our dusty orange neighbor, but signs of life have been hard to come by. We know that Mars was one probably very, very wet, and that it likely had a more robust atmosphere long ago, but has life ever called Mars home? We simply don't know, but a new discovery made by the Curiosity rover offers what might be a tantalizing clue.In a new blog post, NASA's Jet Propulsion Laboratory describes the discovery of what it calls "su