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Running with Sneaker Science
At mile 12, my feet were already starting to hurt. By mile 17 of this year’s Boston marathon, I was overwhelmed by an urge to stop. The muscles in my thighs were cramping up. My back ached. The soles...
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Gravity Tractor as Asteroid Mover
Movie producers love the idea, partly because it’s so scary and partly because it could actually happen. The setup is this: An asteroid is screaming toward Earth. A collision is inevitable. When the...
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