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Cover Figure


COVER Reconstructing the posture of an extinct animal from isolated bones. The humerus of a Devonian tetrapod, found in Pennsylvania, shows that it could support the front end of its body in a low, wide stance. This posture reflects an intermediate stage in the evolution of amphibian limbs from fish fins. See page 90. [Art by Kalliopi Monoyios]

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Science. ISSN 0036-8075 (print), 1095-9203 (online)