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Practice Reading: Multiple Choice, Single Answer
ID: #4374
Bipedalism
Although bipedalism, or walking upright on two legs, is a characteristic most often associated with humans, new evidence indicates that lizards may have been bipedal significantly earlier than humans—I 25 million years ago. There are currently fifty known species of lizard that use a two-legged gait, but limited fossil records had made it impossible to conclude when this capability evolved.
Recently, however, fossilized lizard footprints have been found that capture an individual specimen in the process of accelerating from a four-legged walk into a two-legged run. This find, the oldest of its kind, suggests that bipedalism helped the ancient lizard to evade predators and survive to successfully reproduce.
Recently, however, fossilized lizard footprints have been found that capture an individual specimen in the process of accelerating from a four-legged walk into a two-legged run. This find, the oldest of its kind, suggests that bipedalism helped the ancient lizard to evade predators and survive to successfully reproduce.
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