Knuckle-walking
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Knuckle-walking is a form of quadrupedal walking in which the forelimbs hold the fingers in a partially flexed posture that allows body weight to press down on the ground through the knuckles. Gorilla
A western lowland gorilla knuckle-walking.
Giant anteater walking on its knuckles
Skeletal reconstruction of Spinosaurus aegyptiacus made prior to 2020
Platypus
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The platypus, sometimes referred to as the duck-billed platypus, is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of
Knuckle-walking
…that allows body weight to press down on the ground through the knuckles. Gorillas and chimpanzees use this style of locomotion, as do anteaters and platypuses. Knuckle-walking helps with actions other than locomotion on the ground. Gorillas use fingers for the manipulation of food, whereas chimpanzees use…
Duck billed platypus Scottsdale
A book for children published in Germany in 1798
Illustration from the first scientific description in 1799
Colour print from 1863