Science: Thorny Theory

A weapon for early man ?

The question has daunted anthropologists ever since 1871, when Charles Darwin grappled with it in his The Descent of Man. How did the puny early ancestor of modern man defend himself against predators? More than 3½ million years ago, he stood only 120 cm to 140 cm (48 in. to 56 in.), too short to wield a heavy club effectively. For another million years or so, his brain was not developed enough to conceive of fashioning stone weapons. Yet despite the presence of far more powerful four-legged adversaries...

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