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Lack Of Deep Sleep May Set The Stage For Alzheimer's

A mouse's brain clears out toxins during periods of deep sleep — including toxins that form the sticky plaques associated with Alzheimer's disease. Could the same hold true for people?

The Year In Eggs: Everyone's Going Cage-Free, Except Supermarkets

Egg producers who for years said they couldn't give up cages for egg-laying hens made the switch to cage-free in 2015. Big egg buyers, including McDonald's, Nestle and Subway, made commitments, too.

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National Zoo Cuts Hours, Prompting A Petition From Neighbors

Starting Jan. 1, the Smithsonian National Zoo will open later and close earlier, eliminating three hours of visitor time each day, and some D.C. residents aren't happy about it.

The Biggest Threats To Birds And How You Can Help

It's not easy being a bird. There are windows, cell towers, wind farms, habitat destruction and especially cats. NPR's Linda Wertheimer speaks with Talkin' Birds host Ray Brown about avian dangers.

After Killing Of Cecil, White House Enacts Protections For Lions

Months after an American dentist shot and killed a beloved African lion named Cecil, the Obama administration moves to protect lions in Africa through the Endangered Species Act.

Large Snake Hops A Ride On MTA Bus In Brooklyn

Forget about snakes on a plane. A photo on social media showed the snake crawling along the edge of a window last weekend. MTA workers were able to remove the snake.

Tasmanian Devils Return To Los Angeles Zoo

After 20 years without a devil, the LA Zoo has welcomed a pair of the marsupials. Generations of U.S. children first were introduced to Tasmanian devils through Taz, a Looney Tunes animated character.

Fish Stocks Are Declining Worldwide, And Climate Change Is On The Hook

Fish populations aren't replenishing themselves like they used to. Researchers say there's not enough food for young fish, and it's directly linked to changing temperatures.

Dodging Droppings, Romans Cope With Massive Influx Of Starlings

Every year, the Eternal City plays host to millions of migrating starlings. That creates problems — slippery, splattery problems. Falcons have been enlisted to drive them away, but have failed.

Scientists Strike Giant Paleontological 'Gold'

Scientists at the University of Edinburgh have found a field of dinosaur footprints on the Isle of Skye. The footprints were made by giant dinosaurs 50 feet long that weighed nearly 20 tons.