NatGeo fulldocumentaries. Fireflies - Face Of Chemistry. Back to the Future. How Quantum Suicide Works. A man sits down before a gun, which is pointed at his head.
This is no ordinary gun; it's rigged to a machine that measures the spin of a quantum particle. Each time the trigger is pulled, the spin of the quantum particle -- or quark -- is measured. Depending on the measurement, the gun will either fire, or it won't.