The evolution from reptile-like to upright posture in mammals was highly dynamic and complex (IMAGE)

PLOS

The evolution from reptile-like to upright posture in mammals was highly dynamic and complex

Caption

The sprawling-upright transition; an early forerunner of mammals, Ophiacodon, and a modern mammal, a dog.

Credit

Kenneth Angielczyk, from Brocklehurst RJ, et al., 2025, PLOS Biology, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

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Credit must be given to the creator.

License

CC BY

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