For many decades, a fantasy among space enthusiasts has been to invent a device that produces a net thrust in one direction, without any need for reaction mass. Of course, a reactionless space drive of this type is impossible. Or is it? By Charles Platt
Charles Platt shows you how to build a noise-detecting siren that stuns rude shouters into silence.
"John Mulholland was a brilliant stage magician who revealed his best secrets shortly before he died in 1970," says Charles Platt. "His mind-reading trick has always been my favorite."
Charles Platt presents a science demonstration involving magnets that will interest juggalos and non-juggalos alike.