New Study Suggests We Are Alone in Universe
Computer model created at Sweden’s Uppsala University says planet Earth may in fact be only one supporting life
NASA Astronaut Set to Return After Year in Space
Scott Kelly talks about flight's legacy, what he’s learned, what he misses most, and whether a trip to Mars is possible
Zuckerberg: No Place for Hate Speech on Facebook
Answering a question Friday at a town hall event in Berlin, Zuckerberg says "hate speech has no place on Facebook'' and that he had being instituting better controls on monitoring and removing it
