<p>Take a tour of the solar system with Mars Exploration Rover scientist Steve Squyres and planetary scientist Heidi Hammel.</p>

A Conversation with John Hodgman

Science, pop culture, and comedy collide on StarTalk Radio! Neil deGrasse Tyson, astrophysicist and Director of New York's Hayden Planetarium, and his comic co-hosts, guest celebrities, and scientific experts explore astronomy, physics, and everything else there is to know about life in the universe. New episodes premiere Tuesdays. Keep Looking Up!