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In which year did Carl Sagan publish his seminal paper on the greenhouse effect of Venus?
Answer
1961
Which of Jupiter's moons did Carl Sagan suggest might have a subsurface ocean?
Answer
Europa
What phrase did Carl Sagan popularize as a criterion for extraordinary claims?
Answer
Extraordinary claims require extraordinary evidence
What 1966 book did Carl Sagan co-author with I.S. Shklovskii?
Answer
Intelligent Life in the Universe
How many NASA Distinguished Public Service Medals did Carl Sagan receive?
Answer
Two
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What phrase did Carl Sagan popularize as a criterion for extraordinary claims?
Answer
Extraordinary claims require extraordinary evidence
What 1966 book did Carl Sagan co-author with I.S. Shklovskii?
Answer
Intelligent Life in the Universe
What is the title of Carl Sagan's 1994 book featuring the Pale Blue Dot photograph?
Answer
Pale Blue Dot
What spacecraft took the famous "Pale Blue Dot" photograph?
Answer
Voyager 1
In 1990, Carl Sagan received which medal for his contributions to physics education?
Answer
Oersted Medal
At which university did Carl Sagan teach as an assistant professor before joining Cornell?
Answer
Harvard University
What was the name of Carl Sagan's 1995 book promoting scientific skepticism?
Answer
The Demon-Haunted World