Submitted by violetmammal4694 t3_1231x4h in askscience
AnattalDive t1_jduxjzy wrote
Reply to comment by CyclicDombo in Why are nonhuman erect bipedal animals so rare? by violetmammal4694
he mentions penguins specifically because in contrast to other birds their appearance is a much straighter one, like humans.
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