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Cracking the Code of Life
Understanding heredity
de Maupertuis
Crick & Watson
Genome Project
Aristotle's blood-centered understanding of heredity probably spawned the terms "bloodline" and "blueblood" (from the color of veins), which refer to lineage.

384-322 B.C. Aristotle
Aristotle's understanding of heredity, clearly following from Pythagorean and Empedoclean thought, held wide currency for almost 2,000 years. The Greek philosopher correctly believed that both mother and father contribute biological material toward the creation of offspring, but he was mistakenly convinced that a child is the product of his or her parents' commingled blood. Semen, Aristotle held, was a man's purified blood, which could engender a child when coupled with menstrual blood inside a woman's body.

Watch the Program Here | Our Genetic Future (A Survey)
Manipulating Genes: How Much is Too Much? | Understanding Heredity
Explore a Stretch of Code | Nature vs Nurture Revisited
Sequence for Yourself | Journey into DNA | Meet the Decoders
Resources | Update to Program | Teacher's Guide | Transcript
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