Researchers found that ancient hominids—including early humans—were exposed to lead throughout childhood, leaving chemical traces in fossil teeth. Experiments suggest this exposure may have driven ...

"Human children grow at a uniquely slow pace by comparison with other mammals. When and where did this schedule evolve? Have technological advances, farming and cities had any effect upon it?

Shaw Badenhorst works for the University of the Witwatersrand. He receives funding from GENUS, the National Research Foundation and the Palaeontological Scientific Trust. South Africa has one of the ...