How We Proved Earth Rotates Using a Giant Swinging Ball People have suspected that Earth rotates for thousands of years, but how did we first prove it? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts How batteries work Compilation of UFO Sightings – 2009 to 2011 Are We Living in an Ancestor Simulation? ft. Neil deGrasse Tyson Ocean acidification: The other carbon dioxide problem Inside a Lab Hacking Athletic Performance Wormholes Explained