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One Voice in the Cosmic Fugue

   1980    Science
Sagan discusses the story of the Heike crab and artificial selection of crabs resembling samurai warriors, as an opening into a larger discussion of evolution through natural selection (and the pitfalls of intelligent design). Among the topics are the development of life on the Cosmic Calendar and the Cambrian explosion; the function of DNA in growth; genetic replication, repairs, and mutation; the common biochemistry of terrestrial organisms; the creation of the molecules of life in the Miller-Urey experiment; and speculation on alien life (such as life in Jupiter's clouds). In the Cosmos Update ten years later, Sagan remarks on RNA also controlling chemical reactions and reproducing itself and the different roles of comets (potentially carrying organic molecules or causing the Cretaceous–Paleogene extinction event).
Series: Cosmos

The Persistence of Memory

   1980    Science
The idea of intelligence is explored in the concepts of computers (using bits as their basic units of information), whales (in their songs and their disruptions by human activities), DNA, the human brain (the evolution of the brain stem, frontal lobes, neurons, cerebral hemispheres, and corpus callosum under the Triune Brain Model), and man-made structures for collective intelligence (cities, libraries, books, computers, and satellites). The episode ends with speculation on alien intelligence and the information conveyed on the Voyager Golden Record.
Series: Cosmos
Through the Wormhole Season 7
Through the Wormhole Season 7

   2016    Culture
Through the Wormhole
Through the Wormhole

   2011    Science
Blue Planet II
Blue Planet II

   2017    Nature
Frozen Planet
Frozen Planet

   2011    Nature
Stephen Hawking's Favorite Places
Stephen Hawking's Favorite Places

   2016    Science
Wonders Of The Universe
Wonders Of The Universe

   2011    Science
How Art Made the World
How Art Made the World

   2006    Art
Hiroshima
Hiroshima

   2005    History