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Fitness trackers  |  U. Pittsburgh
Don’t bank on wearables to keep weight off

Wearable devices that monitor physical activity are not reliable tools for weight loss, say researchers. As a matter of fact, they may have the opposite effect.
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Flow of time  |  UC Berkeley
Physicist explains why time travel isn’t possible

In a new book, physicist Richard Muller answers the question: Why does the arrow of time flow inexorably toward the future, constantly creating new "nows?" His idea: Time is expanding because space is expanding.
Video: Muller discusses time travel

Spinal cord injury  |  Rice
How to 'knit' severed spinal cords with graphene ribbons

A new material made of graphene nanoribbons and a common polymer might help knit damaged or even severed spinal cords. Scientists used it to restore function in a rodent with a spinal cord injury. "We think we’re on the right path," says James Tour.
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Algebra  |  Johns Hopkins
Blind people do math in the ‘visual’ cortex

People blind from birth appear to do math in a part of the brain typically devoted to vision, a study finds. “If we can make the visual cortex do math,” says Marina Bedny, “in principle, we can make any part of the brain do anything.”
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Knee damage  |  Johns Hopkins
Is testosterone why ACL tears are worse for women?

Women are 10 times more likely to suffer ACL damage than men. A lack of testosterone, which may strengthen the same ligament in men’s knees, could be why.
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Image of the Day

A new fluorescent sensor developed by researchers at Penn State is highly sensitive and highly selective for chloride, the key diagnostic marker in cystic fibrosis. The device detects salt concentrations in sweat or other bodily fluids. Read more

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