Evolution

Millipedes, often blind, have come up with clever physical signals to ward off sexual advances from members of wrong species.

A tiny fossil skull reveals the oldest known vertebrate capable of crunching hard-shelled prey

A pair of fossil skulls reveal how Smilodon fought with each other

Anthropologists found parasite eggs in ancient poop samples, providing a glimpse of human health as hunter-gatherers transitioned to settlements. Christopher Intagliata reports.

Researchers combined laboratory and simulated experiments on 3-D-printed wings to find the ideal wing shape

New fossils and analyses of ancient ocean chemistry reveal the surprisingly deep roots of the Cambrian explosion

The now-extinct animals once lived from Florida to Alaska, and weighed as up to 100 kilograms

Why dolphins, seals and other animals developed the capacity to sleep with half their brain awake

New research shows that primate calls deter predators in the wild 

Birds are living dinosaurs, but can they help us understand how their extinct relatives moved?

Some wild female bonobos introduce their sons to desirable females—then make sure their relations won’t be interrupted by competing males. Karen Hopkin reports. 

Are they the first animal embryos? 20 years post-discovery, these and other fossils from the 600-million-year-old Doushantuo Formation remain frustratingly enigmatic