StarTalk Radio

Science, pop culture and comedy collide on StarTalk Radio! Astrophysicist and Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities and scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! New episodes premiere Friday nights at 7pm ET.


Cosmic Queries: Time-Keeping

It’s time for a new episode of Cosmic Queries, where Neil deGrasse Tyson answers fan questions about photons, tachyons, the speed of light, the physics of the universe and time itself.


 2013-03-28  43m