How and why did we evolve in the Ethiopian rift valley?

https://drive.google.com/file/d/0B_YPAmqEh1MrNGlTVW4yRVNkQm8/preview

Research Question:  How and why did we evolve in the Ethiopian rift valley?

Thesis:  The spark of human evolution was the changing of habitat.

• Topic Sentence #1: The process of human evolution did not occur until the habitat changed.

• Topic Sentence #2: The process of human evolution was put to a stop during the aceurectus radimus stage.

• Topic Sentence #3: Humans have adapted to live in almost all conditions, since we have evolved so much.

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