Stephen Colbert Says Elon Musk Is Either a Supervillain or a Superhero

Elon Musk appeared on "The Late Show with Stephen Colbert" last night (Sept. 9) to talk about dropping nuclear bombs on Mars, the future of rocket travel, and a creepy, snakelike robot for electric-car owners. "Are you sincerely trying to save the world?" Colbert asked Musk early in the interview, which covered a wide range of topics, including Musk's ideas about settling Mars (which he called a "fixer-upper of a planet"), and what he considered the biggest challenge of the 21st century. Musk re