Until now, the earliest signs of humans in the Americas dated back about 15,000 years. But new research puts people in California 130,000 years ago. Experts are wondering whether to believe it.

More than a trillion plastic bags are used annually. They're made of a notoriously resilient kind of plastic called polyethylene – but scientists have found that wax worms are able to break them down.

About 35 million Americans suffer some hearing loss, but most don't do anything about it. There's a growing effort to make hearing aids easier and cheaper to buy.

Is trade school the ticket? Does the middle class have the worst debt woes? Listeners weigh in with their burning questions.

The Democratic "unity tour" has produced less-than-unifying headlines for the out-of-power party as progressives seek to oppose President Trump and the GOP.

In quintessential Silicon Valley style, Facebook CEO Mark Zuckerberg unveiled ambitious plans to bring users from 2-D Newsfeeds to 3-D imaginary worlds; and neglected safety concerns.

Researchers found that a protein in human umbilical cord plasma improved learning and memory in older mice, but there's no indication it would work in people.

Getty Images photographer Justin Sullivan's "before-and-after" images show how recent rains in California swelled formerly dry reservoirs and turned brown landscapes green.

Scientists at the University of California, Berkeley have figured out why shoelaces seem to come untied at the worst moments, like when you're running.

After 20 years as the magazine's cartoon gatekeeper, Bob Mankoff is stepping down. He says humor helps us cope with hardship, get along with one another — and, in general, makes life more enjoyable.