Martin models the evolution of life on Earth in a few minutes using the visual aid of a walk through timeline. From 4.6 billion years ago when the Earth was red hot, the timeline illustrates the ...

Earth ejecta, for instance, could hold Earth life. "We're trying to figure out how much mass is reaching Venus from Earth, and how many cells can that mass carry," Emma Guinan, first author of a ...

For months I'd been on the trail of the greatest natural disaster in Earth's history ... ocean lacked oxygen in the late Permian. But most life is concentrated in shallow water, in places like ...

Complex life on Earth may be older than previously thought. New findings suggest that conditions for life existed 1.5 billion years earlier than it was originally considered to have begun.