When crops are surrounded by high levels of carbon dioxide, they're more productive. But they may have lower concentrations of some crucial nutrients, which could increase malnutrition in the future.
Andrea Turkalo spent 22 years in central Africa, studying rare forest elephants. Then civil war forced her to flee — and poachers killed many of the elephants she'd shared a life with.
A legal dispute between Chevron and Patton Boggs, a legendary Washington law firm, is settled. The case centers on allegations that Chevron is culpable for oil contamination in Ecuador's rain forest.
A campaign in Africa to prevent HIV has persuaded 6 million teens and men to get circumcised and aims to sign up 14 million more. To do so, health officials must appeal to male vanity.
Vermont gets ready to become the first state to require food producers to label products that are genetically modified, but not without preparing for major legal battles with companies like Monsanto.
Stanford says it will its divest holdings in coal companies over climate change concerns. It's the most prominent of the roughly one dozen colleges that have decided to sell off fossil fuel holdings.
Stanford will stop investing in coal companies, but coal is still in demand worldwide and probably will be for many years. As long as that's true, coal companies are likely to find willing buyers.
The U.S. is sending a team of experts to help find the nearly 300 abducted schoolgirls. But the nearly three-week delay means that the girls are likely scattered, making the search that much tougher.
Many North Carolina counties have no psychiatrists, so emergency rooms are experimenting with beaming in the doctor on video. The hospital can then provide needed treatment.
When the SS Central America sunk in 1857, it took down tons of gold with it. Gary Kinder, author of Ship of Gold in the Deep Blue Sea, tells the fraught tale of shipwreck and recovered treasure.