Neil deGrasse Tyson, author of 'Astrophysics for People in a Hurry,' visited 'The View' and talked about being the first American to receive the Stephen Hawking Medal. Neil recounts a conversation he had with Stephen Hawking and helps explain why Hawking believes humans only have 100 years left on earth. He also answers the question of whether or not having sex with a robot behind your partner's back is cheating. Watch 'The View' WEEKDAYS at 11e|10c|p.