Science

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.

Once the Cold War ended, much of Russia's surplus uranium from thousands of decommissioned weapons wound up in crumbling military facilities. In 1993, the U.S. Department of Energy made a deal to have the material converted to fuel for U.S. power plants. The last shipment arrives today.

After several years of declining shrimp stocks, regulators have imposed a moratorium on shrimping in New England waters. The closure could hurt commercial fisherman and future demand for the Gulf of Maine shrimp, but scientists say the move may be the only way to prevent the population from collapsing.

The world wants Syria's chemical arsenal destroyed. But so far, no country has offered to do the dirty work on its soil. Over the past week, an alternative has gained ground: Carry out the destruction at sea. The plan taking shape is complicated and untested, but it just might work.

The notoriously short night's sleep that many tired adolescents get isn't all about surging hormones and too much homework, according to a sociologist who looked at shifting sleep patterns from ages 12 to 15. Teens who report good relationships with family and schoolmates tend to sleep better.

To forecast sudden global catastrophe — and, perhaps, head it off — we should be spying on the climate at least as closely as we spy on each other, an expert panel warns. Yet the primary global monitoring network has been cut by 30 percent.

The U.S. aims to reduce carbon dioxide emissions by 80 percent by 2050. Wind and solar power can help. But folks doing the math say other pricey, controversial technologies — such as burying carbon gas underground, and expanding nuclear power — are also likely to be part of a low-carbon future.

Scientists have identified special cells in the brain's hippocampus that mimic a trick of some digital cameras. These cells automatically 'tag' the memory of each event in our lives with information about where that event took place — the better to recall, perhaps, where we left our lost keys.

Science isn't known as a career field that attracts showboats. But academics must give seminars, pharmaceutical researchers present results, and graduate students defend their work. In San Diego, one of the country's science hubs, a group aims to teach scientists the art of small talk and public speaking.

Renewable energy has become a $220 billion a year industry. But to significantly slow climate change, the power of wind, solar and other renewable sources must vastly expand. Some say the tech breakthroughs needed are on the horizon, though a top economist sees a tougher road ahead.