About Cosmos: A SpaceTime Odyssey Season 1, Episode 4 : Heaven and Hell

A descent through the hellish atmosphere of Venus to explore its broiling surface serves as a warning to our world about the possible consequences of the increasing greenhouse effect. Then Dr. Sagan leads us on a tour of our solar system to see how other heavenly bodies have suffered from various cosmic catastrophes.  Guest Stars: Jonathan Morgan Heit, Patrick Stewart,