Dogs wag their tails for more than joy. Explore the brain science and emotional complexity behind this common behavior.

It is an interesting thought experiment to ponder whether humans could have evolved with tails. The Na'vi people of "Avatar," alas, are science fiction.

Three stories above the Field Museum's exhibits, rows and rows of taxidermied chipmunks filled a tray in the museum's mammal ...

Macchiato suffered the devastating double blow of being returned by his adopters and then being diagnosed with inoperable cancer.

Animal psychic Jackie Weaver gave my wary cat Humphrey a reading that surprisingly revealed his personality, habits and even his secret demands.

Nicole Meeuws said she was officially pronounced dead for two minutes ...

Ants may be tiny – but by working together they build complex societies and solve many problems. They might even teach humans ...

Braces, rubber bands, even jaw surgery—millions endure them in pursuit of a straighter smile. But were misaligned smiles ...

Australian goannas adapted remarkably well to harsh climates. Scientists looking for hidden bone structures in lizards may be ...