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Republican presidential candidate Ted Cruz is barnstorming across Iowa, where his appeal to evangelical voters is making him a threat to GOP front-runner Donald Trump in the first caucus state.

As tension boils between the two regional powers, witnesses say it's not clear that Iran's embassy sustained damage, or was even hit.

Yes, according to an economist who wrote a blog post that went viral in 2013. Now he has expanded the basics in a book, The Index Card.

The parasitic varroa mite has been wiping out honeybee colonies globally since the late '80s. Now scientists and beekeepers have teamed up to selectively breed bees with a unique, mite-fighting trait.

Commentator Dede Donahue didn't always think about the guns she couldn't see. That is, until she had children. She first wrote about her experience in the Washington Post.

In the city of Qom, ayatollahs and hardliners fret that their government relinquished too much in its nuclear deal with the U.S. and other world powers. "God knows what we gave up," says an ayatollah.

Meet the Zomba Prison Project. It's a band of singers and musicians — and they're all in a jail in Malawi.

Ted Cruz said he doesn't consider waterboarding torture, and Donald Trump said he would bring back "worse" methods. We break down whether that would be an option under the law.

Hamburg officials say single-use pods waste resources and aren't always recyclable. The city is believed to be the world's first to oust the capsules from schools, offices and other institutions.

As students head back to school, districts are faced with the age-old problem of making sure they show up. A principal in St. Louis resorted to extreme measures: installing washers and dryers.