Neil deGrasse Tyson: Mark Watney v. Hal from “2001”

After Tyson's performance of "An Astrophysicist Goes to the Movies," he answered one final geek question backstage at the Morrison Center in Boise, Idaho.
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After Tyson's performance of "An Astrophysicist Goes to the Movies," he answered one final geek question backstage at the Morrison Center in Boise, Idaho.