Scientists have successfully genetically modified chickens to make their feathers resemble those of dinosaurs. This study is part of a broader effort to understand how and why feathers evolved.

The microinjection robot detects embryos that are one-hundredth the size of a grain of rice, calculates a path, and automates the process. Credit: Andrew Alegria, University of Minnesota Twin Cities ...

The Indigenous peoples of the Bolivian highlands are survivors. For thousands of years they have lived at altitudes of more than two miles, where oxygen is about 35 percent lower than at sea level.

A genetic study shows how human breeding choices influence ear length in dogs and why those traits persist across breeds.