Important Quantum Effects in Our World
Superconductivity Discovered in 1911 by K. Onnes
Completely baffling in classical physics
Explained in 1957 by Bardeen, Cooper And Shrieffer
at the Univ. of Illinois. (Bardeen is the only person to win two Nobel Prizes in the same field!) Due to all the electrons acting together to form a
single quantum state -- electrons flow around a wire
like the electrons in an atom!