Ancient tooth enamel undermines history of African cattle herding

Ancient tooth enamel undermines history of African cattle herding
Nairobi, Kenya (UPI) Mar 10, 2015 - When the Sahara desert began expanding 5,500 years ago, cattle herders were forced to migrate southward, following and the grasslands southward. But around 2,000 years ago, archaeological evidence suggests the herders' ended north of Lake Victoria, where new bushland habitat introduced the tsetse fly. Previously, archaeologists have surmised that the tsetse - and the sometimes deadly d ... more

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