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.
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.
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.
Neil Armstrong, who became the first man on the moon, is remembered not just for his historic walk, but also his sense of humor and humility. Fellow astronaut Rusty Schweickart says Armstrong will also be remembered as "a symbol of what humanity can do when it sets its mind to it."
Just how do trees die? It seems like a simple question, but the answer still eludes scientists. And understanding forest ecology is increasingly important as the effects of climate change begin to take root.
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