When did NOVA Season 19 Episode 20 air?
NOVA Season 19 Episode 20 aired on December 29, 1992.


PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.
NOVA examines the high-tech efforts to preserve the world's animal diversity. Noah needed only an ark—but today's conservationists need all the tools that biology, ecology, diplomacy and politics can muster if endangered species are to survive beyond the next century.
Direct answers for episode-level questions and details.
NOVA Season 19 Episode 20 aired on December 29, 1992.
This episode runs for approximately 55 minutes.
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