In honor of Carl Sagan's birthday, watch his 6 best 'Cosmos' clips
Sagan, who died in 1996, was an astronomer, astrophysicist, and an avid and skilled science communicator. He taught at Cornell University, hosted the PBS series "Cosmos: A Personal Voyage," wrote the book "Contact" and many others, and published more than 600 scientific papers.
Though "Cosmos" is now 35 years old, Sagan's wisdom is timeless and the clips (our favorite six and a few extra are below) are still moving.
You can watch most of "Cosmos" on various YouTube channels, or order the DVD from Amazon. For more about Sagan check out his Wikipedia page or one of the many books written about his life.