User:McMaster3F03/sandbox
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The earliest Fossil record of Hominini appeared approximately 6mya, depicting a species with the ability of walking upright on two legs. With the expansion of grasslands bipedal hominins were able to find new sources of food, wild game, and utilize their bipedal walking to distinguish themselves from other hominoids. The change in locomotion allowed for several morphological changes to the skeleton, such as evolution of the forelimbs, Pelvis, feet, Skull, Chin, and Mandible. Additionally, hominins steadily developed a larger cranial capacity which resulted in a greater brain mass and level of intelligence. Other morphological changes, which currently exist in current human physiology, are no longer a necessity nor serve a substantial purpose. These vestigial traits include the appendix, Plantaris muscle, wisdom teeth, and Palmer Grasp Reflex.
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