Summary: For over 40 years after superconductivity was discovered, scientists wondered if they would ever find the theory behind it. Then suddenly, this seemingly unsolvable mystery was cracked wide open. Leon N Cooper, one of the physicists who won the Nobel Prize for the theory of superconductivity gave a talk emphasizing that we not give up on seemingly unsolvable questions too quickly, and cited many other examples of "unsolvable" mysteries that physics has managed to illuminate.
