Popularized in the late 1950s as a child’s toy, the hula hoop is undergoing renewed interest as a fitness activity and performance art. But have you ever wondered how a hula hoop stays aloft against ...
Hula hooping is so commonplace that we may overlook some interesting questions it raises: "What keeps a hula hoop up against ...
A trio of physicists from the University of Rennes, Aoyama Gakuin University, and the University of Lyon have discovered, ...
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