Broom Center Research Associate Michael Gurven has discovered that men in
isolated indigenous populations have baseline testosterones that are 33
percent lower than men living in the United States.  Also, in contrast to
men in the U.S., the Tsimane, Bolivian foragers-farmers, do not show
declines in testosterone as they age. The researchers' findings recently
appeared in the Proceedings of the Royal Society B.  According to the
author, the lives of the Tsimane offer a glimpse of how humans survived
before industrialization and modern amenities. "Our lifestyle is now an
anomaly, a major departure from our species' long-term existence as
hunter-gatherers," said Gurven. 

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