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

Carl Sagan

As a Guest

3 segments

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.


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.


As a Topic

1 segment

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