Navajo Healing Ceremony (1:05) --
Emissaries from Earth (3:36) --
SETI Radio Telescopes (2:36) --
Frequency for Interstellar Communication (2:30) --
Calculating Factors for Alien Life (2:23) --
Importance of Our Sun (3:21) --
Models for Stars (2:23) --
Promising Stars for Life (2:39) --
Atmosphere and Liquid Water (2:39) --
First Forms of Life (2:51) --
Evolution of Intelligence (3:05) --
The Great Silence (2:35) --
Time Span of Civilizations (3:25) --
Technological Advances Promise Success (2:57) --
Credits: Are We Alone? (0:43).
