How the Extreme Art of Dropping Stuff Could Upend Physics
Babies love it, and Galileo supposedly tried it: Drop some objects from on high, and see how fast they fall. According to Einstein\u2019s theory of general relativity, all objects in Earth\u2019s gravity, regardless of mass, should descend at the same rate in the absence of air resistance. But there are plenty of reasons to believe this might not be true.