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How Physics Limits Brain Power

Just as shrinking transistors makes computers more powerful, brains with smaller components could in principle pack in more power and become faster. Human neurons, however--and in particular, their long “tails,” called axons--may already be at (or close to) their physical limit.

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Video: FDA issues new sunscreen guidelines

The FDA is issuing the first new sun block guidelines in over thirty years. Betty Nguyen reports, the goal is to reduce skin cancer by changing the labels on sunscreen products.

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The Power of Theory in Science

"He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast." -Leonardo Da Vinci It's often lonely, these days, as a theorist. As soon as most people hear the word theory , in fact, they start thinking about something like this: [More]

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The Nose Knows: How Malaria Mosquitoes Sniff Out Human Targets [Slide Show]

Scientists have never fully understood how mosquitoes distinguish the smell of human breath and sweat from other odors in nature. To learn more, molecular biologist John Carlson at Yale University and colleagues relied on a mutant strain of fruit fly. Each of a series of mosquito genes that code for smell receptors was transplanted, individually, into the fruit flies, which have an "empty" smell-detecting neuron lacking smell receptors

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iFive: Pandora Prices IPO, China-U.S. Cyber War?, Color Loses Founder, Next-Gen Xbox In Testing, Garmin Buys Navigon

This is the complete rear face of the sun, imaged for the first time in this manner by NASA's two STEREO solar imaging spacecraft on June 1. It's intriguing, and also relevant: Scientists are predicting that the next 11-year Solar Cycle could be very muted, which some suggest leads to an extended period of cold weather on Earth.

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