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Unique among Earth's creatures, turtles are the only animals to form a shell on the outside of their bodies through a fusion of modified ribs, vertebrae and shoulder girdle bones. The turtle shell is a unique modification, and how and when it originated has fascinated and confounded biologists for more than two centuries. Scientists have recently discovered that the beginnings of the turtle shell started 40 million years earlier than previously thought.
Published On: 31-May-13 03:24 AM
Source: ScienceDaily
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Published On: 31-May-13 03:24 AM
Source: ScienceDaily
Go to Original Article