Jurassic fossil reveals ancient origins of how mammals drink milk

An international team of researchers has uncovered new evidence illuminating the evolutionary origins of one of the defining features of mammals: the ability to suckle and consume milk during infancy. Their findings, published in Nature, suggest that key anatomical structures required for mammalian suckling, swallowing and breastfeeding behaviors evolved nearly 165 million years ago, long before the appearance of modern mammals.

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