WHAT'S INSIDE: PHYSICAL SCIENCE
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Biting on aluminum foil can be painful -- basically, when you bite on foil, you build a battery in your mouth. Ouch!
Lance Armstrong, Jose Canseco, Mark McGwire: The list of superstar athletes accused of -- or admitting to -- taking performance-enhancing drugs is almost as impressive as the number of sports that they compete in. And we're not just talking about steroids anymore.