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1-14 of 14
- Astronomer Carl Sagan leads us on an engaging guided tour of the various elements and cosmological theories of the universe.
- Carl Sagan looks at the search for life on Mars from the speculations of Percival Lowell and H.G. Wells to the arrival of the Viking probes.
- Carl Sagan examines the possibility extraterrestrial life and discusses his skepticism about UFOs.
- After briefly looking at the pseudoscience of astrology, Carl Sagan examines the history of astronomy from ancient times through Ptolemy to Johannes Kepler.
- Carl Sagan examines the nature of comets before turning to a close look at the planet Venus.
- Carl Sagan explains scientific concepts like relativity and examines the possibility of time travel.
- Carl Sagan examines the origin, development, and complexity of life on Earth and speculates on the possibility of life developing elsewhere in the universe.
- Carl Sagan looks at the work of ancient Greek scientists and astronomers including Thales, Anaximander, Democritus, and Pythagoras.
- Carl Sagan examines our planet's place in the universe by leading us on a journey from Earth to Deep Space.
- Carl Sagan looks at the planets Jupiter and Saturn by examining the work of Galileo, Huygens, and the Voyager probes.
- Carl Sagan focuses on the origin of the universe by discussing the Big Bang, Galaxies, Dimensions, and the expansion of the universe.
- Carl Sagan examines the life cycle of stars from their creation to their deaths.
- Carl Sagan examines life on earth discussing genes, DNA, the brain, and human social development.
- Carl Sagan considers the significance of science and discuss the importance of human survival in the nuclear age.