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A social movement need not have liberal goals.
Orrorin
An early hominin genus dating back to about 6 million years ago, speculated to be among the first bipedal primates.
Ardipithecus
One of the earliest genera of bipeds that lived in eastern Africa. Ardipithecus is actually divided into two species, the older of which dates to between 5.2 and 5.8 million years ago, and the younger, A. ramidus, dated to around 4.4 million years ago.
Spinal Column
The flexible longitudinal column made of a series of bones called vertebrae, which houses the spinal cord and provides structural support to the body.
Adult Human
An individual who has reached a mature stage of growth and development, typically considered to begin after adolescence.
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