Today's Google doodle celebrates Erwin Schrödinger's 126th Birthday. Erwin Schrödinger is most famous for his though experiment Schrödinger's Cat which explores quantum theory superposition. The cat in the box with a vile of poison which will at some point break represents a sub-atomic particle whose properties cannot be accurately predicted, only observed through measurement. The cat cannot be assumed to be alive or dead, as it may be either, so the cat is assumed to be alive and dead. Only when the box is opened is the cats fate revealed.