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Early humans may have first walked upright in the trees | UCL News - UCL – University College London
Golden & Glitter - Chimp Photo of the Week! Jorly walking upright at Tchimpounga Chimpanzee Rehabilitation Center | Facebook
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530+ Chimpanzee Walking Stock Photos, Pictures & Royalty-Free Images - iStock | Chimpanzee walking upright
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Our ancestors may have evolved to walk upright in trees rather than on the ground, new study suggests | CNN
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