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Oklahoma Attorney General Scott Pruitt has sparked controversy for his denial of climate science and his ties to fossil-fuel interests. Here's what to expect in Wednesday's confirmation hearing.

No need to risk sugar shock, folks. We've got a whole bunch of experiments you can do with leftover candy that are possibly more fun than eating it.

The idea of using leeches to treat ailments is ancient — and no longer in favor. But now these blood-suckers are gaining new respect as a doctor's helper during surgery.

Global warming has so far seen a gradual rise in average temperatures. But that may change, with extreme variations. And poor countries could bear the brunt of it.

Amid President Trump’s executive action on so-called sanctuary cities, a new analysis by UC San Diego political science professor Tom Wong examines the effects of sanctuary policies on crime and the economy.

After warning of elevated lead levels in her patients in Flint, Mich., Dr. Mona Hanna-Attisha faced a backlash: "The state said that I was an unfortunate researcher, that I was causing near-hysteria."

Police are getting better tools for mining data. They're supposed to make law enforcement more surgical, but some say it's a high-tech justification for targeting certain places and people.

Despite improved safety standards over the years, more than 230,000 children under 15 months old were treated in hospital emergency rooms for injuries related to infant walkers from 1990 through 2014.

Across the country, in the past year and a half, at least 250 university professors have been targeted in cyber harassment campaigns because of their research, teaching or social media posts.

The new House tax bill introduced by Republicans outlines a plan to end the tax exemptions for tuition waivers and tax endowments made to colleges and universities.