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Scientist Carl Sagan poses next to a model of the Viking moon lander

Carl Sagan

As a Guest

3 segments
08:18

Remembering Scientist Carl Sagan

Astronomer and Pulitzer Prize winner Carl Sagan died today at the age of 62. A spokesman for the Cancer Research Center says Sagan died from pneumonia after suffering from bone marrow disease for two years.

Obituary
24:15

Carl Sagan on Preventing Nuclear Winter

The famed astronomer and writer is co-author of the new book, "A Path Where No Man Thought." It's about the theory that even a small nuclear war would lead to a nuclear winter that would devastate the earth.

Interview

As a Topic

1 segment

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