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Tooth and Claw:
How does a skunk spray an enemy?
Can a porcupine shoot its quills?
What do a shark's teeth look like, and how are they used?
When do deer fight with their antlers?
How does a cat use its claws for hunting?
Are all spiders poisonous?
Nature has provided animals with different kinds of "weapons" for hunting and self-defense. Without them, many animals could not survive in the wild. This book describes some common and unusual animal weapons, and shows how they are used. [via]