Evolution

Adding a chapter in the story of what makes us human

Where humans migrate, mammals become smaller

If you have ever wondered why your cat behaves the way it does, wonder no more

Microbes thrived on ancient Earth, even with very little oxygen

Communication with the placenta is key to ensuring body parts grow at the same rate

A reassessment of ancient bones has revealed a new identity for the largest bird to walk the Earth

An aerial laser scan of more than 800 square miles of Guatemalan jungle revealed Maya buildings, canals, roads and bridges. Christopher Intagliata reports.

Breweries, warehouses and waste facilities sometimes turn to cats for rat control—but do they really help?

Half-billion-year-old fossils reveal new details about one of the most mysterious chapters in Earth’s history

Five-toed tracks found in Argentina revise what paleontologists thought about a strange group of animals called dicynodonts.

The marine mammals have extraordinarily sensitive touch—which helps them nab prey in the absence of other sensory cues. Christopher Intagliata reports.