Press Play with Madeleine Brand

Neil deGrasse Tyson on why humans should really go to Mars

Astrophysicist Neil deGrasse Tyson explains why he opposes the idea of putting some humans on Mars in case a catastrophe wipes out Earth. He argues that we should go to the red planet purely for scientific innovation. He also talks about the multiverse, time travel, and his book “Astrophysics for People in a Hurry.”