What is inside of a black hole? #blackhole #briangreene #space #science | World Science Festival

Quantum entanglement is the strangest quality of quantum reality. Einstein called it "spooky," because, well, it is. Join Brian to explore the basic ideas visually and then take a look at the essential equations. | World Science Festival

Albert Einstein and his colleagues Podolsky and Rosen proposed a simple way to rid quantum mechanics of its most disturbing feature--called non-locality--in which an action undertaken here can affect the result of a measurement undertaken there, even if here and there are far apart. John Bell came up with a way to test Einstein's vision of reality, ultimately showing that Einstein's vision was wrong. | World Science Festival

Does gravity “know” about quantum mechanics? #gravity #quantummechanics #quantum | World Science Festival