Hi! I am a robot. I just upvoted you! I found similar content that readers might be interested in:
http://nautil.us/issue/8/home/the-cavemans-home-was-not-a-cave
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Hi! I am a robot. I just upvoted you! I found similar content that readers might be interested in:
http://nautil.us/issue/8/home/the-cavemans-home-was-not-a-cave