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How to Fly Like a Bat
Are Propellers Fin-ished?
Ready, unplug, drive
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The solar system's biggest junkyard
Earth's Poles in Peril
Catching Some Rays
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Invertebrates

The word Invertebrate describes any animal which does not have a spine. Although lacking an internal skeleton, many invertebrates make up for this by developing a shell (as with snails), or a hard exoskeleton that protects their entire body (as with lobsters and insects.) Having a shell doesn't qualify an animal as an invertebrate, however; many invertebrates are soft-bodied, relying on other ways to protect themselves from their environment.

Invertebrates
Invertebrates








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