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Steve Silberman talks about how Nazi extermination plans and a discredited scientific paper about childhood vaccines shaped our current understanding of autism.

Is this the year when menstruation went from taboo topic to entrepreneurial opportunity? High-profile moments (including one featuring Donald Trump) may be remaking social attitudes about the period.

Diners were likely to get duped 67 percent of the time when ordering salmon in restaurants out of season, a survey says. Much of the deception involved farmed salmon passed off as more expensive wild.

Federal funds are supporting two different disaster-prevention approaches — coastal retreat, or people leaving flood zones, and coastal defense, or building infrastructure to protect at-risk areas.

Most of the seafood Americans eat is imported; a lot of that is illegally caught. Now, environmentalists are using satellites to track pirate vessels on the high seas and help crack down on the trade.

People move to Austin's Mueller neighborhood to become part of a progressive community. But some black residents say they haven't always felt welcome — so Mueller decided to do something about it.

The treatments are popular in India and the United States, but some can be contaminated with high levels of lead and other toxic metals. People continue to be harmed.

More than 100 nations will sign the climate change deal agreed to in December. It will eventually commit nealy all the world's governments to cut back on greenhouse gases that cause global warming.

The advice for avoiding Zika virus: Don't get bitten by mosquitoes in countries where the virus is spreading. So which repellents work — and which don't?

Ivo Cassol is a prominent Brazilian politician who made his money in cattle ranching and logging in the Amazon. He says the world should pay Brazil a lot more if it wants to preserve the rain forest.