Seventeen years of Treehouse talk

Seventeen years of Treehouse talk

Wednesday, March 14, 2018

An astrophysicist's tribute to Stephen Hawking

"His passing has left an intellectual vacuum in his wake. But it's not empty. Think of it as a kind of vacuum energy permeating the fabric of spacetime that defies measure. Stephen Hawking, RIP 1942-2018." ~~ Neil deGrasse Tyson on Twitter

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