1. On the occasion of Carl Sagan's sixtieth birthday / Wesley T. Huntress, Jr.
2. The search for the origins of life: U.S. solar system exploration, 1962-1994 / Edward C. Stone.
3. Highlights of the Russian planetary program / Roald Sagdeev.
4. From the eyepiece to the footpad: the search for life on Mars / Bruce Murray.
5. Environments of earth and other worlds / Owen B. Toon.
6. The origin of life in a cosmic context / Christopher F. Chyba.
7. Impacts and life: living in a risky planetary system / David Morrison.
8. Extraterrestrial intelligence: the significance of the search / Frank D. Drake.
9. Extraterrestrial intelligence: the search programs / Paul Horowitz.
10. Do the laws of physics permit wormholes for interstellar travel and machines for time travel? / Kip S. Thorne.
11. The age of exploration / Carl Sagan.
12. Does science need to be popularized? / Ann Druyan.
13. Science and pseudoscience / James Randi.
14. Science education in a democracy / Philip Morrison.
15. The visual presentation of science / Jon Lomberg.
16. Science and the press / Walter Anderson.
17. Science and teaching / Bill G. Aldridge.
18. The relationship of science and power / Richard L. Garwin.
19. Nuclear-free world? / Georgi Arbatov.
20. Carl Sagan and nuclear winter / Richard P. Turco.
21. Public understanding of global climate change / James Hansen.
22. Science and religion / Joan B. Campbell.
23. Speech in honor of Carl Sagan / Frank Press.
24. Carl Sagan at sixty / Frank H. T. Rhodes.
