Neil DeGrasse Tyson! Andy Weir! Space, pop culture and physics!

Neil DeGrasse Tyson explains how pop culture fits into his plan to inundate us with a love of science. Andy Weir, author of The Martian, talks about his nerdy origin and what makes good sci fi believable. We remember the first professional female astronomer Maria Mitchell, and there's a nerd confession from BJ Leiderman.