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chp 1-9.
| 256728191 | bipedalism | the preference for walking on two limbs rather than four | 0 | |
| 256728192 | Paleolithic Age | (750,000 BCE - 10,000 B.C.E.) Old Stone Age. A period of time in human history characterized by the use of stone tools and the use of hunting and gathering as a food source. | 1 |
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