The first hint of a brain developed on Earth around 600 million years ago, and now, some version of the organ can be found in nearly every animal in the world. Humans have the largest brain size ...

Paul Jones does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

A novel genetic model suggests that the ancestors of modern humans came from two distinct populations that split and reconnected during our evolutionary history.