Mass and length may not be fundamental properties of nature, according to new ideas bubbling out of the multiverse. Though galaxies look larger than atoms and elephants appear to outweigh ants, some physicists have begun to suspect that size differences are illusory. Perhaps the fundamental description of the universe does not include the concepts of "mass" and "length," implying that at its core,
This spring, a company announced that powdered alcohol, or Palcohol, would soon be hitting the market. But in the wake of widespread worry about health risks, its approval by the Alcohol and Tobacco Tax and Trade Bureau was rescinded. Still, no amount of legislation could keep dampen the curiosity of Popular Science senior editor Paul Adams. So he whipped up his own recipe for powdered alcohol. No
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