Generally, as people age, the rate of mortality increases. Yet there’s one period, the timeframe between a child’s first day of life and age 5, when mortality tends to decrease as the child gets older.
MoreNew study marries genetics, archaeology and suggests groups in ancient Africa traveled, swapped goods, ideas . Between 80,000 and 50,000 years ago, people across early eastern and southern Africa left behind traces of an explosion of symbolic expression reflected in far more intensive
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