Early Earth was a barren wasteland incapable of supporting life until a big protoplanet crash carried in the necessary ingredients, a new study suggests. That collision of the proto-Earth and a ...

The exact moment when Earth will reach its tipping points—moments at which human-induced climate change will trigger ...

Early Earth may not have had the right ingredients for life — until a nearby Mars-size planet crashed into it, two new studies hint. Early Earth was a barren wasteland incapable of supporting life ...