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There are now 7 billion people, according to the U.N.'s population division. That prompts a question: Who else is in the 7 Billion Club? To learn which other animals had reached that plateau, we asked wildlife experts — who said it's a tough call.

Europeans are developing a third option that lies somewhere between legalization and prohibition of marijuana: limited use in private clubs.

A program in Ethiopia promises a farmyard incentive to families that don't marry off an underage daughter.

Democratic presidential candidate Joe Biden proposes letting 60-year-olds enroll in Medicare. He'd pay for the expansion out of general tax revenue, he says, not the Medicare fund.

Remembering Rosanelle Eaton, the North Carolina woman who in her 90s became the face of efforts to overturn laws that civil rights activists said discriminated against black voters.

In a recent survey, 1 in 5 parents thought that using a household spoon was OK for measuring their child's medicine. It's not. Here's how to help little kids without overdosing them.

American universities have created a consortium that offers temporary academic homes for refugee scholars threatened by war and authoritarian governments.

People who've had dose 1 are wondering ... can I have a few drinks before dose 2 or will that muck things up? Also: Do you really understand the concept of "vaccine efficacy"? It's complicated!

The bombing and its aftermath revealed a massive, highly coordinated homeland security apparatus that can organize a mass casualty disaster or lock down a major American city at a moment's notice. Or both.

When it comes to women's shoes, fashion often trumps function. But as women age, comfort starts to compete with style. Cue the rise of the trendy comfort shoe.