Carl Sagan, writer and scientist, returns from the frontier to tell us about how the world works. In his delightfully down-to-earth style, he explores and explains a mind-boggling future of intelligent robots, extraterrestrial life and its consequences, and other provocative, fascinating quandaries of the future that we want to see today.

Introductory music from the original score for COSMOS: A SpaceTime Odyssey composed by Alan Silvestri, used with permission from Cosmos Studios, Inc. and Chappers Music. All rights reserved. Special thanks to Fuzzy Planets, Inc.