A new study identifies a likely ancestor to all placental mammals.

A short-nosed bat bests its nectar-drinking cousin at pollination.

DNA evidence identifies the world’s rarest whale.

City-dwelling coyotes in the United States choose lifelong partners.

A submersible microscope reveals plankton behavior.

Have black widow spiders lost their bite?

Cephalopods turn skin patterns on and off to fool predators.

Nicotine-related pesticides may be responsible for bee population decline.

An Ohio research lab helps save rhinos mutilated by poachers.

A distinctive croak heralded a new species of frog in New York.