The Common Genetic Code

Paul Nurse describes his research that showed that humans share some genes with organisms as different from us as simple brewer's yeast. Footage from Secret of Life: "Immortal Thread."

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Evolutionary Roots of Language

This video excerpt from NOVA scienceNOW looks at how language and tool-making may have coevolved.

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Reverse Evolution Machine

In this video adapted from KQED's QUEST, learn how scientist David Haussler is using biotechnology to reconstruct ancient genomes in an effort to find out how animals have evolved over time.

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Transitional Tetrapod Fossil

In this video segment from NOVA: "Judgment Day: Intelligent Design on Trial," learn about the discovery of a well-preserved transitional fossil and how such transitional fossils support the theory of evolution.

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What Is a Theory?

In these two audio interviews from NOVA Online, learn about the difference between the common understanding of the word "theory" and how science uses the term.