by Matthew Cobb
All tetrapods have kneecaps, although it appears that they evolved more than once. Even tuatara have kneecaps (it was long thought they did not). And here’s a kneet biomechanics demonstration of why they are so useful, and what you can and can’t do without them.
Kicking myself for not thinking of demonstrating this biomechanical principle this way myself. https://t.co/bAta34O4n4—
Paul Ingraham (@PainSci) February 24, 2016
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