For over a century, scientists have wrestled with one of biology’s most fundamental mysteries: how the first animals evolved. These earliest creatures emerged more than 600 million years ago in ...

An international team of geneticists and molecular biologists has discovered the first-known, free-living eukaryote to have lost its mitochondria. In their study, published in Nature Communications, ...

Evolution is a continuous, powerful force shaping the natural world around us. As environmental pressures intensify, future animal evolution is likely to produce fascinating and sometimes bizarre new ...