In A Brief History of Time, Stephen Hawking described what would happen to an astronaut who fell into a black hole. The unlucky astronaut would be "stretched like spaghetti" and torn apart by the gravitational gradient.

Or might this astronaut be flash-fried by a firewall of energy

As The New York Times reported, there is a whole cottage industry of black hole astronaut death theorizers, and at stake is the basis of Einstein's general theory of relativity. 

Read more here

Read Stephen Hawking's lecture "Into a Black Hole" here.

Read a challenge to Hawking here

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