If human newborns came out as fully developed as chimp babies, human pregnancy would have to last at least twice as long. In a new theory, researchers argue that how much energy mothers can spare is the key factor in how long pregnancy lasts.
Water wells and streams in Leroy Township, Pa., have been bubbling up with methane gas in the past few months. The state's Department of Environmental Protection blames nearby natural gas fracking operations. A local well operator has installed water filters for residents and says the problem has been fixed.
An experiment that paired sounds with smells suggests basic forms of learning are possible while snoozing. The key seems to be a phenomenon known as conditioning — a form of simple learning made famous by Ivan Pavlov and his dog.
Astronaut Neil Armstrong, the first person to walk on the moon, died Saturday. He was 82. Armstrong solidified his place in history on July 20, 1969 when he left the first human footprint on the surface of the moon. NPR's Neal Conan remembers the man his family called a "reluctant hero."
Neil Armstrong, the first man to walk on the moon, died over the weekend at the age of 82. Steve Inskeep talks to Neil Degrasse Tyson, director of the Hayden Planetarium in New York, about Armstrong's impact on space exploration.
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