Bok
10-04-2012, 03:03 PM
Ancient animal’s teeth were made of six different tissue types
More... (http://www.sciencenews.org/view/generic/id/345513/title/Duck-billed_dino_could_slice_and_dice)
More... (http://www.sciencenews.org/view/generic/id/345513/title/Duck-billed_dino_could_slice_and_dice)