The rattleback--it's been intriguing us since prehistoric times. Seeming to defy the laws of physics, it spins in one direction, "rattles" to a stop, and then changes direction, as Neil deGrasse Tyson demonstrates above. How does the rattleback work? To get into that, watch this technical video from William Case, a professor at Grinnell College. Or review the resources on this web page. In either case, you will need to wear your thinking cap.
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