When picturing the earliest animals on Earth, most people imagine ancient fish or tiny marine creatures drifting through prehistoric seas. But new research has revealed a far more humble origin story ...

Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities that changed very little over time. When environmental pressures pushed ...

The amazing survival strategies of polar marine creatures might help to explain how the first animals on Earth could have evolved earlier than the oldest fossils suggest, according to new research.

Sexual reproduction only began to improve when early animals began facing more stress and competition ...

Life on Earth started in the oceans. Sometime around 475 million years ago, plants began making their way from the water onto the land, and it took another 100 million years for the first animals with ...