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The Mating Game

   2006    Nature
Sex is the key to the immortality of genes, and any tactic necessary will be deployed in the cause of reproduction - even if it's suicidal to the participant. This episode explores many of the most ingenious, complex, and dramatic methods that animals employ to ensure the continuation of their genetic line.
Series: Triumph of Life

The Survivors

   2006    Nature
Some 65 million years ago, the dinosaurs were wiped out when their gene machines failed to cope with the cataclysmic changes that followed a comet's collision with Earth. But with extinction came new life, and surviving mammals evolved to seize the territory left vacant by the vanquished. The concluding episode explores the factors that make winners and losers in the game of life, and poses the question: Who will triumph in the long run?
Series: Triumph of Life

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

The Secrets of Quantum Physics
The Secrets of Quantum Physics

   2014    Science
What is the Right Diet for You
What is the Right Diet for You

   2015    Medicine
Seven Ages of Rock
Seven Ages of Rock

   2007    Art
Enemies of Reason
Enemies of Reason

      Medicine
The Normans
The Normans

   2010    History
Woody Allen A Documentary
Woody Allen A Documentary

   2011    History
Wild South America
Wild South America

   2005    Nature