Humans and other primates are outliers among mammals for having nails instead of claws. But how, when and why we transitioned from claws to nails has been an evolutionary head-scratcher. Now, new ...

Working together and exchanging services for the benefit of everyone involved is crucial for humans and partly responsible for our success as a species. In order to achieve a goal, we need to choose ...

Nicola F. Koyama 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 ...