A jaw-dropping conundrum: Why do mammals have a stiff lower jaw?

PHYSorg
Jun 27, 2023, 10:20 am97 pts
From the 20-foot-long jawbones of the filter-feeding blue whale to the short, but bone-crushing, jaws of the hyena and the delicate chin bones of a human, the pair of lower jawbones characteristic of mammals have evolved with amazing variation.

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