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Unformatted text preview: 1. Anatomically humans were ready to speak more the 150,000 years ago. This was due to raw brain capacity and throat anatomy. The evidence does not show up till about 40,000 years ago in the form of tools and other artifacts. 2. Humans would have been capable of speech 200,000 years ago according to Jeffrey Laitman of Mount Sinai Medical Center. He states that the larynx descended and that the tongue was rooted to the throat. There are no other benefits for these changes other than speech. The other physical evidence is the size of brains growing about a half a million years ago to 1500 cubic centimeters. Also, with the growing brains was the brain organization with implicated speech due to changes in the frontal and temporal lobes. The first behavior evidence is found in the fact that humans started using specialized tools and that “specialized language” was needed to convey these ideas and improve...
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This note was uploaded on 04/28/2008 for the course ASB 211 taught by Professor Wolfe during the Summer '07 term at ASU.
- Summer '07