Stone tools helped shape human hands

  • Posted by a hidden member.
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    Apr 14, 2013 3:08 PM GMT
    http://www.newscientist.com/article/mg21829124.200-stone-tools-helped-shape-human-hands.html
  • barriehomeboy

    Posts: 2475

    Apr 14, 2013 11:21 PM GMT
    Other way around. It's the human hand with the opposing thumb that allowed us to grasp the rocks and hold them and fashion them into tools. See, even the cave gays were the designers!
  • Rhi_Bran

    Posts: 904

    Apr 16, 2013 2:02 PM GMT
    ^ I'm not so sure about that. The mutations leading up to opposing thumbs wouldn't have been selected for if we'd had no reason to grasp things so firmly.
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    Apr 16, 2013 2:28 PM GMT
    I thought wacking off shaped human hands. Or does the hand shape our dicks? Ever notice how the dicks of many right-handed guys curve slightly to the left until they get fully hard, while the dicks of lefties curve to the right?