Carl Sagan predicted the mess 2021 would be 25 years ago
3:54
MSNBC.com
Carl Sagan predicted the mess 2021 would be 25 years ago
Astrophysicist and author Carl Sagan managed to predict a lot of the things the challenges America faces in the year 2021 all the way back in 1995 when he was writing a book published just before his death in 1996. MSNBC's Brian Williams shares the details.
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