HIS-1101 Lecture Notes - Lecture 4: Pituitary Gland, Parallel Evolution, Australopithecine
Document Summary
Smaller troop sizes (20-25) easier to feed, more vulnerable. Must become more migratory- contest quest for food/water. New long migration patterns take some hominins out of africa (1. 7m- 1. 0m bp) Took advantage of pleisocene land bridges a. egypt- sinai- palestine- middle east b. somalia- aden strait- arabia- middle east. After generations living in middle east some expat troops return to africa, interbreed with resident african hominins. First early humans evolve out of hominin stock in 3 regions: three theories for humanization exist. Fusion- populations of separate early humans interact and fuse into modern. Out of africa- 2nd migration brought superior stock out of africa humans. Support: fossils and chronology too widespread for displacement, artifacts- signs of warfare among groups, dna/rna- we are hybrids. Early humans- 3 distinct branches but share common traits: brain size 1400cc or longer.
