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February 8, 2013 At its closest approach, the office building-sized asteroid will be only about 17,200 miles above the surface of our planet. That's far nearer to us than the moon, and even closer than some weather and communications satellites. Some people think this near miss should serve as a wake-up call.

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February 7, 2013 What killed the dinosaurs? It's history's ultimate murder mystery, and for decades the prime suspect has been a giant asteroid. New data suggest that it struck right before the extinction. But scientists say it still may not tell the full story of what happened to the dinosaurs.

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February 7, 2013 A team of researchers from the British Antarctic Survey stumbled upon some interesting satellite images in 2009: a trail of penguin poop that showed signs of a huge colony of emperor penguins. A team of researchers finally made it out to visit the 9,000-strong colony last December, marking the first human contact the animals had experienced.

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February 6, 2013 Building your own stuff boosts your feelings of pride and competence, and also signals to others that you are competent. As a result, most of us believe we labor on things we love. Now, psychologists are asking if it is the other way around — is it labor that leads to love?

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February 5, 2013 A study finds that guys who watched a lot of TV had lower sperm counts than more active fellows. The effect held true even when other factors, such as body weight and diet, were taken into account.

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February 4, 2013 Some people with damage to a specific region of the brain called the amygdala do not feel fear. If you make them handle a snake or show them a scene from a scary movie such as The Shining, they won't be affected. But breathing in air with high levels of carbon dioxide can send them into a panic.

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February 3, 2013 Johns Hopkins Hospital is using disinfecting robots to kill dangerous drug-resistant bacteria in its hospital rooms. Since it began using the machines, the hospital has seen the number of untreatable infections fall by a stunning 64 percent.

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February 1, 2013 Research from an Ohio sociologist has found that inmates "earn" illegal money in greater amounts after they serve time. Prison may serve as a classroom where inexperienced delinquents learn from hardened criminals — and become more dangerous criminals themselves.

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January 31, 2013 Owls can turn their heads 270 degrees without injuring themselves. That's more than twice as far around as humans can safely handle. Nifty adaptations in owls' vertebrae and blood vessels make it possible.

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January 29, 2013 On the deck of a 27-foot boat off the shore of Long Island, researchers are using sonar to study the sand and sediment that washed away from the system of protective barrier islands and beaches by Hurricane Sandy.

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January 29, 2013 Microbes can thrive in extreme environments, from inside fiery volcanoes to down on the bottom of the ocean. Now scientists have found a surprising number of them living in storm clouds tens of thousands of feet above the Earth. And those airborne microbes could play a role in global climate.

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