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 These Vertical Farms Use No Soil and 95% Less Water This $26 Billion Underwater City Could Be Ready in 15 Years Light Flashes on The Moon We Still Can’t Figure Out 3 Weird Stars You Can See with the Naked Eye Why nuclear plants are shutting down Why power lines have those strange looking devices