Have you ever puzzled over the meaning of a particular wildlife word or phrase? Then puzzle no more! From the 'Fraser Darling effect' to the 'K-T Boundary', our glossary provides the explanation – in ...

The tight fit of a baby's head through a mother's birth canal, which causes great difficulty in childbirth, is not unique to humans, as previously understood. Instead, some small-bodied primate babies ...

The tight fit of a baby's head through a mother's birth canal, which causes great difficulty in childbirth, is not unique to ...

Josh Hokit’s transphobic remark about former first lady Michelle Obama deserves a deeper examination — not because it was new, but because it was familiar.