Scale of the Galaxy (2:44) --
Galileo Galilei (2:03) --
Stars in the Milky Way (3:45) --
Planet and Stars to Scale (3:09) --
First Planet Spotted (2:00) --
Kepler Telescope (3:57) --
Goldilocks Zone (2:30) --
Generating Heat Through Friction (3:48) --
Moon Orbiting the Gas Giant (2:59) --
High Probability of Alien Life (1:29) --
Sound of the Universe (1:54) --
Listening to Space (2:04) --
Giuseppe Cocconi and Philip Morrison (3:06) --
The Great Filter (3:45) --
Fragility of Life (3:44) --
Conclusion: Are We Alone? (3:07) --
Credits: Genius By Stephen Hawking: Are We Alone? (0:19)
