Different in degree or kind (Introduction)

by xeno6696 , Sonoran Desert, Tuesday, December 24, 2013, 18:16 (3773 days ago) @ David Turell


> > Matt: Which I argue can be explained that as we shifted from living in trees to living on the plains, walking upright, hand gestures (which are used extensively by gorillas in the wild) no longer worked for nomadic hunters that had to spread out in order to catch large prey. The driver for translating hand gestures into sounds created a selective pressure based on the survival demands of hunting.
> 
> Your suppositions are only a small part of the underlying story.I don't expect you to remember a bit from my book (pg. 128) that the physical adaptations for speech arrived with H. erectus 1.5 million years ago, long before real speech is thought to have begun. One of Ian Tattersall's exaptations. The changes involved arching the palate, dropping the larynx and developing an epiglottis to prevent trachea blockages, and better tongue muscles to wrap around word pronunciation, well before speech appeared..-But that just tells the story of how selective pressure of hunting resulted in driving humans towards language. We were on the ground before H. Erectus fossils were created.

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