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The Pacific purple sea urchin's appetite for kelp threatens marine ecosystems along the California coast as it ravages the "lungs of the ocean." The solution, biologists say, might be on our plates.

Pizza makers in New York are remembering Domenico "Dom" Demarco, the founder of the beloved Brooklyn pizzeria Di Fara, who has died at the age of 85.

Research shows that sleep deprivation makes people emotionally volatile and temperamental — a fact that hasn't escaped the notice of some reality TV producers, who deny contestants sleep in an effort to kick up televised drama.

Pras Michel has been convicted in a federal court in Washington, D.C., on 10 counts related to charges that include conspiracy, witness tampering and failing to register as an agent of China.

A mastodon tooth washed up on a California beach and then went missing. A local museum tried to track it down.

News broke Thursday that in 2005, the CIA destroyed at least two videotapes made three years earlier that showed harsh interrogation techniques. Intelligence committee members from both parties say they weren't told about the tapes or about plans to destroy them.

U.S. Alpine skier Mikaela Shiffrin looks unstoppable everywhere except the Olympics. She's running out of chances to medal at the Milan Cortina Games.

A niche industry of tour companies is taking people into wolves' habitat at Yellowstone National Park. Montana Public Radio's Dan Boyce went on an expedition with a man who recognizes the problems wolves bring to the landscape even as he makes his living off of them.

The plan has been for U.S. and NATO military personnel to be be in Afghanistan at least another two years to advise the Afghan military. Attacks and protests, though, are making it increasingly difficult to perform that mission.

Teachers and school districts say they agree better teacher evaluations are needed, but they can't agree on the details. Disputes in Hawaii and New York could lead to revocation of lucrative federal grants and also force the Department of Education to take aggressive action.