Designers of feline-focused tablet apps are learning a lot about how pets play.

And they ask for help when they don’t.

A U.S. district court in Montana ordered the agency to reconsider its bid for wolverines as a threatened species.

Some right whales disappear for years, only to reemerge in strange places with a baby.

Immunity to a last-resort antibiotic can develop in bacteria that haven’t been exposed to that antibiotic.

The insects have a kind of stereovision that works in a completely different way than ours.

It’s often said that the ocean releases them from the constraints of life on land. It’s actually the opposite.

For one group of tiny crustaceans, the species whose males invest most heavily in sex disappear ten times faster.

After losing an unnecessary gene millions of years ago, marine mammals are now uniquely vulnerable to pesticides that have only existed for a century.

A diminutive new species, only six feet long, fills an important gap in the origin story of the famed T. rex.