Carl Sagan

American astrophysicist, cosmologist and author (1934–1996)

Discussed in 2 episodes Wikidata (Q410) →

Episodes

#5798: Project Sundial: Teller's 10-Gigaton Doomsday Proposal

Edward Teller proposed a 10,000-megaton bomb in 1954. The physics allowed it — the delivery problem killed it.

Oct 9
#5600: Alien Abductions: 4 Million Claims, Zero Evidence

Nearly four million Americans say they've been abducted. Not one has produced a lab-verifiable artifact. What's going on?

Sep 27