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Evolution: Great Transformations
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Program Overview
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What triggered the incredible diversity of life on Earth, and how
have complex life forms, including humans, evolved? Is there
direction to evolution? And is human intelligence inevitable? This
program focuses on evolution's "great transformations"—among
them the development of a standard four-limbed body plan, the
journey from water to land, the return of marine mammals to the sea,
and the emergence of humans. Driven by a combination of opportunism
and a genetic "toolkit," these astounding leaps forward define the
arc of evolution. And they suggest that every living creature on
earth today, and every species that has ever existed, is a variation
on a grand genetic theme—a member of one, and only one, tree
of life.
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