Seven smashing atom smashers

The Large Hadron Collider, a 17-mile-round atom-smasher on the French-Swiss border, has been 14 years and several billion dollars in the making. The machine is designed to rev up opposing beams of particles to nearly the speed of light and smash them together. The debris will help scientists probe some of the deepest questions in science. Learn more about the LHC and six more atom-smashers that were at the cutting edge of science in their day.