The mystery of how life on Earth originated , and whether it exists elsewhere in the universe, are "the raison d’être of space exploration", said Louis Friedman, co-founder of the Planetary Society.

When Earth’s ancient supercontinent Nuna broke apart, it reshaped oceans, cooled the climate, and set the stage for complex ...

A Florida biochemist claims to have evidence that life began on Mars and eventually arrived on Earth by way of a meteor. In his own words, that would mean that—yes—"we are actually all Martians." ...

Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick ...

The odds that the universe is bursting with life seem to be getting better all the time. Astronomers recently announced that there could be an astonishing 20 billion Earthlike planets in the Milky Way ...