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A pair of NASA spacecraft is getting set to orbit the moon this weekend, a move that will kick off the probes' effort to study Earth's nearest neighbor from crust to core. [More]

Our Milky Way is just one of many billions of galaxies that dot the cosmos--an ordinary spiral in a universe filled with them. The unspecialness of our corner of space, an idea known as the Copernican principle, is a cornerstone of modern cosmology.

At the dawn of 2012, computer security looks a lot like it did five years ago--everything protected by a user ID and password. But that’s all set to change in the next five years

Nobody likes getting shots.

You may have never personally caught sight of Jesus Christ’s face in a potato chip, but you have likely succumbed to an equally improbable belief at some point in your life. Many people claim that ghosts exist or that their dreams can predict the future.

* Fire on nuclear submarine in northern Russia * Radiation levels normal, no casualties - government [More]

Key concepts [More]

Key concepts [More]

Different foods require different amounts of energy to produce.

For more than 50 years fossil fuels and fertilizers have been the key ingredients in much greater global food production and distribution. The food-energy relationship has been a good one, but it is now entering a new era. Food production is rising sharply, requiring more carbon-based fuels and nitrogen-based fertilizers, both of which exacerbate global warming, river and ocean pollution, and a host of other ills

For more than 50 years fossil fuels and fertilizers have been the key ingredients in much greater global food production and distribution.

Forget leap years, months with 28 days and your birthday falling on a different day of the week each year.

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For shift workers, odd hours usually mean strange sleeping habits and unhealthy meals. And now an editorial in the journal Public Library of Science Medicine takes the position that unhealthy eating associated with unusual working hours could be considered a new form of occupational hazard. Because such eating is a risk factor for obesity and diabetes.

Since physical abilities decline as people age, many people think the elderly are also less able to perform mental jumping jacks as they age. New research indicates this might not be true with all brain-powered tasks: In some ways the elderly are fit to compete with their younger counterparts. [More]