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What is evolutionary 'trade-off'?
An evolutionary trade-off is when a beneficial change in one trait comes at the cost of another. In this story, the long-held idea was that human evolution involved a trade-off between a pelvis good for walking and one good for childbirth. The new research challenges this, suggesting a different primary evolutionary driver for pelvic shape.
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Neanderthal pelvises suggest childbirth mattered more than walking for evolutionRelated explainers
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