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Lecture

Theories on Obligate Bipedalism.docx

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Department
Anthropology
Course
ANTH 2231
Professor
B.Galdiks
Semester
Summer

Description
Theories on Obligate Bipedalism  Aferensis have shown this trait (~after 4 mya)  Evolved from practicing habitual bipedialism  Natural selection – dominant form of locomotion  Most quadrupeds are faster than humans  Lots of carnivores in Africa = dangerous  Our skeleton evolved from the quadrupedalism to bipedalism  Quadrupeds  Skelton like a suspension bridge o 2 front legs and back legs and the ―suspension‖ backbone o Good for carrying weight  Lower back/knee problems  Fallen arches in the feet Tool Use (Traditional Theory)  Suggested by Darwin  We know that chimps make simple stone tools  3.4 mya—stone tools cut marks  Chimps use rocks and sticks as tools  If you look at us in particular, we have got the most precise grips  Not likely to be a by product of evolution Males Provisioning Females (O. Lovejoy and H. Fisher) Encephalization V
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