Chapter 25: The History of Life on Earth
ExtinctionsExcerpts from A History of Earth in 100 Groundbreaking DiscoveriesEndosymbiotic Theory
Domains & Divisions of Life
Human EvolutionBecoming Human brings together interactive multimedia, research and scholarship to promote greater understanding of the course of human evolution.
Follow human geneticist Spencer Wells, Director of the Genographic Project of the National Geographic Society, as he tracks down the genetic changes associated with the ability to digest lactose as adults, tracing the origin of the trait to less than 10,000 years ago, a time when some human populations started domesticating animals.
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History of Life
History of the Earth
History of Mammals
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