Treading the Path of our Ancestors
Treading the Path of our Ancestors ANTHRO 101
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This 1 page Class Notes was uploaded by Lauri Schleicher on Monday February 22, 2016. The Class Notes belongs to ANTHRO 101 at Emory University taught by Dr. Stutz in Spring 2016. Since its upload, it has received 15 views. For similar materials see Anthro 101 in anthropology, evolution, sphr at Emory University.
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Date Created: 02/22/16
Treading the Path of ancestors: what makes us human? The characteristics that make us human: brain capacity, extremely good motor skills, bipedalism o Bipedalism: a form of terrestrial locomotion where an organism moves by means of its two rear limbs or legs. o Tool use o Extreme sociality The first hominids+ the process of speciation o The human lineage split away from Chimps and Bonobos approx. 6mya (mya=million years ago) o After that, the Taung child was recognized by Raymond Dalt in 1925 in South Africa Named Australopithecus africanus. Approx. 23 mya Scientists began to realize that the oldest life form came from Africa Other fossils were eventually recognized Very robust traits Younger human forms: what was the evolutionary branch that did not make it? Map of Crucial fossil: concentration in South Africa (Great African Rift Valley) “Lucy”: Australopithecus afarensis approx. 3.1 mya in Ethiopia o East African species 3.72.9 mya o Shows bipedalism Has involved interrelated anatomical changes throughout the body Spine—we have double curvature, apes have less curvature Pelvis—centered in humans and things converging towards knees Hip—apes adapted for power and humans adapted for balance Bipedalism makes the birth canal narrower The human body has less room to maneuver Adaptation to human lineage The beginning of upright walkers: carry things, reach more, scan surroundings more, more exposure, to enemies possibly, can’t climb trees as well, balance o Every time you win something, you lose something “Ardi”: Ardipithecus ramidus in Ethiopia about 4.4 mya o Bipedal (but less so than we) on the ground o Quadrupedal in the trees. MIXED ANATOMY o A tree living hominid with a combination of anatomical features which situates it as close to the common ancestor as chimps
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