Anti-transgender activists are generating protests as they drive through the northeastern United States in an orange bus emblazoned with the words "boys are boys" and "girls are girls."...

A former nurse's aide dubbed the "Angel of Death' after he admitted killing three dozen hospital patients in Ohio and Kentucky has died two days after being brutally beaten in his cell at an Ohio stat...

Three inmates on Louisiana's death row say in a lawsuit they face inhumane isolation for 23 hours a day in cells "the size of an average of home bathroom."...

Federal scientists have made a potentially important discovery about the invasive sea lamprey, the longtime enemy of Great Lakes fish...

A new study suggests some livestock grazing can benefit a ground-dwelling bird that has suffered a dramatic population decline across its 11-state range in the U.S. West...

New research says more cancer-causing mutations are due to random chance than heredity or lifestyle risks, but lots of tumors still are preventable...

Officials are considering releasing genetically modified mosquitoes in Houston as part of the fight against the insects known to carry diseases such as the Zika virus...

National Oceanic and Atmospheric Administration researchers who are studying the decline of Steller sea lions in Alaska have turned to a new venue for assistance...

Doctors say three women were left nearly or totally by an unproven stem cell treatment at a private clinic in Florida...

Researchers are studying how seal whiskers function in order to reverse-engineer the system for U.S. Navy technology...