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Killer whales are one of only three species known to have menopause. Researchers are looking at the conflict and cooperation between older and younger female whales to understand why.

Storms dumped rain and snow all along the coast, prompting evacuations, closing roads and knocking out power to tens of thousands of customers. But all that water has helped the West's severe drought.

When scientists activate hunting circuits in the brains of genetically modified mice, the animals attack insects and even bottle caps as prey. It gives clues to the evolution of hunting in humans.

The inspector general will examine whether FBI Director James Comey's public statements about the Clinton investigation ran afoul of policies that caution against influencing an election.

New Yorker writer Michael Specter discusses emerging biotechnologies that will make it possible to remove disease and change the characteristics of life by rewriting the genetic code in cells.

Calling Biden "the best vice president America's ever had" and a "lion of American history," President Obama gave his White House partner the nation's highest civilian honor in an emotional ceremony.

The National Academies of Sciences, Engineering and Medicine sorted through 10,000 studies to determine the good and bad health effects of marijuana. Tight drug restrictions impede research, they say.

The clergy speaking at Donald Trump's inauguration have mostly non-mainstream theological or political positions. No Muslim or mainline Protestant will speak, but the prosperity gospel will be heard.

After eight years in office, his list of accomplishments is as long as it is controversial.

The Syrian government says Israel also attacked the airport, west of Damascus, in December. The Israeli military has declined to comment.