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Fossil tracks trace dinosaur ancestors’ gradual shift to upright walking

Phys.org reports the transition began in the late Permian and was complete only by the Middle Triassic.

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Phys.org reports that fossil tracks show dinosaur ancestors shifted from sprawling to upright walking in stages, beginning in the late Permian and finishing only by the Middle Triassic. Its linked article describes a research team led by Lorenzo Marchetti documenting early archosauriform footprints from GEOPARC Bletterbach.

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Fossil tracks trace dinosaur ancestors’ gradual shift to upright walking

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