Halley's Comet: Once in a Lifetime
S13E1
–
Gaia, the Greek word for Earth goddess, also is the name of the controversial hypothesis that life on Earth controls the environment. NOVA explores this provocative theory that challenges conventional ways of thinking about the Earth.
Episode
S13E02 · Season 13 · 2 of 21
Aired
28th January 1986
Network
PBS