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A doctor, a vegan, a researcher and a farmer recently waded into a hot-button topic in the food world: Is it a bad idea to eat meat? They delve into the medical, ethical and environmental arguments in the latest Intelligence Squared U.S.

Clothes donated to charity in the U.S. often wind up for sale in African markets. Here's the story of one shirt that started out at a bat mitzvah in Michigan and wound up in a market in Nairobi.

California plans to get 33 percent of its electricity from wind and solar power by 2020. But that will only work if the state can economically store some of the energy for release on cloudy, windless days.

Student athletes know they need to avoid concussions. But hits that don't cause concussion symptoms can affect the brain, too. Researchers are now trying to figure out who is most at risk from those smaller hits, and if they can be warned in advance.

The Food and Drug Administration Wednesday advised companies to change the labels on their drugs to make it illegal for livestock producers to use drugs for "growth promotion" or "feed efficiency." The announcement is the latest step in a long-running effort by the FDA to reduce the use of antibiotics in agriculture.

As many as 6 million pilgrims have made their way to the Mexican capital to pay homage to the Virgin of Guadalupe on Thursday. One woman has turned the country's most revered religious icon into a cartoon characterization, using it to build a multimillion-dollar company.

When Jeremy Richman and Jennifer Hensel lost their daughter in the Connecticut shooting, they couldn't understand why someone would do such a thing. In seeking an answer, they're funding research into the forces that increase a person's risk of aggression — and have also found a path to healing.

Thamsanqa Jantjie was widely criticized as a "fake" for his performance at Nelson Mandela's memorial service. He now says he was hearing voices and seeing hallucinations, according to media reports.

California health officials say bottles of the popular condiment shouldn't be shipped right away so that any micro-organisms inside can be controlled. The producer has also been told to partially shut down its factory to keep smells from irritating neighbors. Will this lead to a "srirachapocalypse?"

Though they may seem still and inert, blocks are constantly evolving.