Start Radiometric dating speed of light

Radiometric dating speed of light

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While upright, non-locomotory limbs become free for other uses, including manipulation (in primates and rodents), flight (in birds), digging (in giant pangolin), combat (in bears, great apes and the large monitor lizard) or camouflage (in certain species of octopus).

Many animals rear up on their hind legs whilst fighting or copulating.

Some animals commonly stand on their hind legs, in order to reach food, to keep watch, to threaten a competitor or predator, or to pose in courtship, but do not move bipedally.

A larger number of modern species intermittently or briefly use a bipedal gait.

Several lizard species move bipedally when running, usually to escape from threats.

Many primate and bear species will adopt a bipedal gait in order to reach food or explore their environment.

Several arboreal primate species, such as gibbons and indriids, exclusively walk on two legs during the brief periods they spend on the ground.

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