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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
Secrets of the Dead
Secrets of the Dead

   2017    History
The Human Body
The Human Body

   1998    Medicine
Motivation
Motivation

   2017    Culture
How the Universe Works Season 6
How the Universe Works Season 6

   2018    Science
The Gene Code
The Gene Code

   2011    Science
Space Deepest Secrets
Space Deepest Secrets

   2018    Science