Carl Sagan on Humans

 
  •  
     
     
     
    March 20, 2012 at 11:41 am

    Famed astrophysicist Carl Sagan talks about humans in a way that only he can.

     
     
    Speak Your Mind
    Tell us what you're thinking... and oh, if you want a pic to show with your comment, go get a gravatar!