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Italian biologist Luigi Cavalli-Sforza, who spent most of his adult life at
Stanford, has written a book that reads more like an autobiography, but is,
nonetheless, an excellent introduction to the field of genetics that he
helped pioneer. In the 1950s Cavalli-Sforza first had the idea that one could
use genetic information to trace the genealogical tree of species, of human
habits and of languages. This method, now widely employed around the world,
led to the understanding of how humans left Africa and populated the rest
of the world. It also helped clarify how farming spread from Europe elsewhere.
And it helped reconstruct the evolution of languages.
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