Suggestions

• What is the title of Carl Sagan's final book?

• What logical assumptions did Sagan apply in his calculation?

• What was Carl Sagan's father's occupation?

• What is the title of Sagan's compilation book?

• When did Carl Sagan receive the Pulitzer Prize for General Non-Fiction?

• How did Sagan's family deal with the realities of World War II?

• What messages did Carl Sagan assemble and send into space?

• What is the significance of the photoelectric cell exhibit at the 1939 New York World's Fair?