Fifty years ago, British anatomist Wilfrid Le Gros Clark explained in a lecture why evolutionary scientists argue so vehemently about how ancient apelike and humanlike creatures eventually gave way to modern humans. “Every fossil relic which appears to throw light on connecting links in man’s ancestry always has, and always will, arouse controversy,” he stated, “and it is right that this should be so, for it is very true that the sparks of controversy often illuminate the way to truth.”
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