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Studies suggest that smoking heavily in adolescence may affect brain function in adulthood, but there's a dearth of hard evidence for voters contemplating pot's long-term effects.

When a Wyoming woman fell ill, no one suspected that she could have rabies from a bat in her bedroom. Health officials say sleeping in a room with a bat is a rabies risk because bites are hard to see.

With various forms of pot legalization sweeping the country, the weed buzzness is booming.

This summer, the first stop for many U.K. partiers will be a special tent where, without fear of arrest, they can get their illegal drugs tested for potency and makeup to prevent overdoses.

The U.S. is trying to figure out whether, and how, to regulate crops that have had their genes "edited." One example: a mushroom that doesn't brown when cut. It could be the first of many such crops.

The San Francisco district attorney led the lawsuit that said Uber falsely claimed its criminal screening of would-be drivers was the most comprehensive available.

The two early states suck up a lot of the attention, but their track records at picking presidents are spotty at best. That doesn't mean they don't matter, though.

The only commercial tea plantation in North America is located on Wadmalaw Island, S.C. It makes tea from bushes descended from plants first brought here in the 1700s. We chat with its tea taster.

Critics have repeatedly attacked California Attorney General Kamala Harris for what they say is her slow progress investigating gun owners legally prohibited from having them.

The water crisis in Flint, Mich., raised an alarm about the dangers of lead in our water supply, but it is not new knowledge. Madison, Wis., knew about it and removed all its lead pipes 15 years ago.