Fossils and genetics are starting to point to life emerging surprisingly soon after Earth formed, when the planet was ...

When American astronauts go back to the moon in the next few years, they'll be checking out two enormous canyons on the south pole, which researchers say were carved by an asteroid nearly four billion ...

Two huge masses deep within Earth may have remained ... back at least half a billion years and possibly even to the formation of the planet more than 4 billion years ago, says Deuss.

Pockets of liquid water existed on Earth already 4.1 billion years ago, with the first oceans forming around 4 billion years ago. But these oceans were highly acidic, preventing life on Earth from ...