Remembering Carl Sagan's Footprints on Space

When it came to explaining the vast cosmos to Americans, there was no one like superstar astronomer and great communicator of science, Carl Sagan.

He reminded us of the "billions and billions" of mysteries that surround us. In books and lectures and on TV, he asked the really big questions.

Carl Sagan died, too young, ten years ago. But the big questions and emerging answers did not.

This hour we're going to listen back to Sagan, hear from his collaborator and wife of twenty years Ann Druyan, and come up to date on the cosmos with astrophysicst Neil DeGrasse Tyson.

This hour On Point: our cosmos and ourselves, ten years after Carl Sagan.

Guests:

Neil Degrasse Tyson, astro-physicist and author of "Death by Black Hole: And Other Cosmic Quandaries."

Ann Druyan, co-writer with Carl Sagan of the best selling book "Cosmos" and producer of the Sagan inspired movie "Contact," widow of Carl Sagan.