Forty Years ago  Carl Sagan brought the wonders of the universe  into our homes with his series Cosmos with his wife and collaborator Ann Druyan. 

Now she’s executive producer on a new series that explores scientific breakthroughs about lost worlds and worlds yet to come called Cosmos: Possible Worlds on the National Geographic Channel.  

Ann Druyan joins to us explain how the new series captures the spirit of Carl Sagan and why she is optimistic about life on our pale blue dot.