Scientists in Switzerland made a sponge from cheesemaking waste that captures gold from discarded electronics — after dissolving metal parts from 20 old computer motherboards, they recovered enough to melt into a 22-carat gold nugget
In 1942, scientists stacked roughly 45,000 graphite blocks beneath the stands of a Chicago football stadium and started the world’s first nuclear reactor — while one physicist waited nearby with an axe, ready to cut a rope and drop an emergency rod if the reaction ran out of control