American astrophysicist Neil deGrasse Tyson dismissed Elon Musk's ambitions to send people to Mars, saying that unless there is a push caused by a shift in geopolitics, it will not be possible as a pure exploration project.

Um, Actually Famed astrophysicist and science fiction pedant Neil deGrasse Tyson doesn't think very highly of multi-hyphenate billionaire Elon Musk's desperate desire to deliver humanity to Mars. During a chat with Bill Maher — who has plenty of quibbles with the plan himself — last week,