

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

An electronic gadget to silence loudmouths

Charles Platt shows you how to build a noise-detecting siren that stuns rude shouters into silence.
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Perform Mulholland's mind-reading mystery

"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."

Why does a spherical magnet fall so slowly through an aluminum tube?

Charles Platt presents a science demonstration involving magnets that will interest juggalos and non-juggalos alike.