East-African human ancestors lived in hot environments, says Caltech-led team

East Africa's Turkana Basin has been a hot savanna region for at least the past 4 million years - including the period of time during which early hominids evolved in this area - says a team of researchers led by scientists at the California Institute of Technology (Caltech). These findings may shed light on the evolutionary pressures that led humans to walk upright, lose most of our body hair, develop a more slender physique, and sweat more copiously than other animals...

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