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7 Things You Didn’t Know About Groundhogs

Happy Groundhog Day! Today is the day each year in which we look towards a giant rodent to find out how much more winter we’ll have to endure. This year, we probably know the answer: winter hasn’t been very wintery, even for Los Angeles

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Controversy: Can Repeat Concussions Cause Lou Gehrig’s Disease? (preview)

Kevin Turner was a premier athlete in the National Football League, a fullback who could run, catch and block. At 6' 1" and roughly 230 pounds, he was slightly undersized for his position, but he had tremendous thrust in his legs and used all of it to launch himself into players who were bigger than he was. He played for the New England Patriots from 1992 to 1994, then joined the Philadelphia Eagles, with whom he stayed until his abrupt retirement in 1999

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Inside Story: What Happens When Brain Hits Skull

Concussion, the most common among traumatic brain injuries, which occurs 1.7 million times a year in the U.S., represents a major public-health problem. It occurs when there is a sudden acceleration or deceleration of the head, a process depicted here in this animation

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9 Bookmarklets I Can’t Live Without

Want to be smarter about your social media activity? Add a few of these mini-apps to your browser. I spend a lot of my work day typing away on a PC (or laptop)—which means that when it comes to my Internet activity, I'm still using a Web browser.

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Could Simple Experiments Reveal the Quantum Nature of Spacetime?

Conventional wisdom has it that putting the words quantum gravity and experiment in the same sentence is like bringing matter into contact with antimatter. All you get is a big explosion; the two just don t go together. The distinctively quantum features of gravity only show up in extreme settings such as the belly of a black hole or the nascent universe, over distances too small and energies too large to reproduce in any laboratory.

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Could Simple Experiments Reveal the Quantum Nature of Spacetime?

Conventional wisdom has it that putting the words quantum gravity and experiment in the same sentence is like bringing matter into contact with antimatter. All you get is a big explosion; the two just don t go together. The distinctively quantum features of gravity only show up in extreme settings such as the belly of a black hole or the nascent universe, over distances too small and energies too large to reproduce in any laboratory.

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