Evolution

Wolves lack the muscles that allow dogs to raise their eyebrows and make puppy dog eyes

First gene associated with cannabis abuse likely affects how people respond to the drug

If we’re a dud cosmic experiment, is there hope?

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

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

New research shows that primate calls deter predators in the wild