Humans rely on sight, sound, taste, touch, and smell to explain the environment around us. But that may not seem impressive ...

Across the animal kingdom, a surprising number of species defy the simple warm-blooded or cold-blooded labels found in textbooks. From leatherback sea turtles that can keep their deep body temperature ...

Most people trust scientists to test new ideas on animals or in controlled labs. But some researchers decided that the best test subjects were themselves. These scientists put their own bodies at risk ...

Experiments on animals (“in vivo” experiments) have long been the norm for learning about human health and disease, because testing on live animals enables researchers to investigate how chemicals, ...