Mar 17
Machines fill the floor of the Exploratorium, San Francisco’s beloved interactive science museum. Over there is a contraption called Bicycle Legs, in which visitors manipulate air pumps to replicate muscles we use when pedaling (it’s trickier than it sounds). A few hundred feet away is a perennial favorite, the Wave Machine, which demonstrates transverse waves with the turn of a crank (even I can manage that one).
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