Science & Technology

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There's a side to the Internet most people have never visited. Tor Hidden Services, or the Tor Network, is an encrypted, hidden network of about 50,000 websites that can't be accessed with a traditional browser like Chrome or Firefox. Its users include criminals, trolls and extremists.

Author Jamie Bartlett, who chronicles the secret corners of the Internet in his book The Dark Net, likens it to the "wild West."

If you give a chimp an oven, he or she will learn to cook.

That's what scientists concluded from a study that could help explain how and when early humans first began cooking their food.

Avian flu is devastating the egg industry across the Midwestern U.S.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

It's a problem in a taxi economy if people don't like getting into cabs that are driven by strangers. A cab driver is a stranger almost by definition. But in the high-crime city of Nairobi, Kenya, people prefer to call up drivers they know or who their friends recommend.

An American named Jason Eisen spent years in Nairobi as a consultant until he had his big idea. He built an app that doesn't just tell you which taxis are close by, like Uber does. It also assigns the driver a trust score, by scouring riders' contacts and social media.

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