Einstein called it “spooky action at a distance,” but today quantum entanglement is poised to revolutionize technology from computers to cryptography.
Physicists have gradually become convinced that the phenomenon - two subatomic particles that mirror changes in each other instantaneously over any distance - is real. But a few doubts remain. NOVA follows a ground-breaking experiment in the Canary Islands to use quasars at opposite ends of the universe to once and for all settle remaining questions. (Premiered January 9, 2019.)