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When scientists got their hands on a collection of the world's biggest gem diamonds, they found something surprising inside — clues about what sits hundreds of miles beneath our feet.

The copy of The Microscope and Its Revelations was kept by a student who graduated in 1894. Now, over a century later, his 77-year-old granddaughter has sent it back. Don't worry about the late fees.

By comparing the light from anti-atoms with the light from regular atoms, they hope to answer one of the big mysteries of our universe: Why is there so much regular old matter and not much antimatter?

One veterinarian at a shelter in New York has become infected with a rare bird flu that infected dozens of cats there. The vet had only mild illness and recovered, as have all but one of the cats.

Doctors have commonly managed the persistent pain of people over 65 with prescription opioids. But that has left some still in pain, and with a physical and emotional dependence that can ruin life.

Politico reporter Michael Crowley discusses President-elect Donald Trump's relationship with Russian President Vladimir Putin. "There's something I think we don't completely understand," Crowley says.

A Sicily court has convicted the ship's captain and another man over the wreck involving hundreds of migrants in April 2015. It was one of the deadliest migrant disasters in the Mediterranean.

A crude oil pipeline in western North Dakota has leaked nearly 200,000 barrels of oil. The scene is about 150 miles west of where protesters have been fighting the Dakota Access pipeline.

Local officials say an asphalt emulsifier entered the city's water system. Some areas have been cleared to use tap water; other residents are still warned to rely entirely on bottled water.

The British government's counter-radicalization program Prevent has had mixed reviews. Supporters say it's reaching those at risk; critics argue it unfairly targets Muslims.