Eyewitness: Shell: As Eyewitness: Shell proves, the shell is one evolutionary design that has stood the test of time. From crabs to seashells to tortoises and bird eggs, the shell has evolved into a magnificent example of nature protecting her own. This... (more details for Eyewitness: Shell)

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File by E.B. (#2130)
2012-06-10 Grade: 9-10