Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities ...

The way that Earth's first animals reproduced held back life's diversity for millions of years, until stress and competition ...

A study has found that the reason why the evolution of the first animals to appear on Earth was delayed for over 10 million ...

Fossils from some of the oldest-known animals on Earth, dating from 574 million years ago (Ediacaran period), suggest that cloning, not competition, dominated the Ediacaran seas, slowing evolution ...