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Heaven and Hell

   1980    Science
Sagan discusses comets and asteroids as planetary impactors, giving recent examples of the Tunguska event and a lunar impact described by Canterbury monks in 1178. It moves to a description of the environment of Venus, from the previous fantastic theories of people such as Immanuel Velikovsky to the information gained by the Venera landers and its implications for Earth's greenhouse effect. The Cosmos Update highlights the connection to global warming.
Series: Cosmos
The Gene Code
The Gene Code

   2011    Science
Ice Age Giants
Ice Age Giants

   2013    Science
Earthflight
Earthflight

   2012    Nature
Breakthrough
Breakthrough

   2015    Medicine
Five Came Back
Five Came Back

   2017    Art
P.U.L.S.E
P.U.L.S.E

   2006    Art
Natural World
Natural World

   2017    Nature