Life may have thrived on early Mars, until it drove climate change that caused its demise
If there ever was life on Mars - and that's a huge "if" - conditions during the planet's infancy most likely would have supported it, according to a study led by University of Arizona researchers. Dry and extremely cold, with a tenuous atmosphere, today's Mars is extremely unlikely to sustain any form of life at the surface. But 4 billion years ago, Earth's smaller, red neighbor may have been mu