Pufferfish Inflate and Carry a Potent Neurotoxin
Tetrodotoxin makes them dangerous to eat unless prepared by trained chefs.
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Most Surviving Sections of the Great Wall Date From the Ming Dynasty
The wall was built and rebuilt over centuries, and the Ming stretches are the best preserved.
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Bombardier Beetles Spray a Boiling Chemical Mixture
They mix chemicals in a chamber and shoot the near-boiling spray at attackers.
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A North American Porcupine Has Around 30,000 Quills
Contrary to myth they cannot shoot them, but the quills detach easily on contact.
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Skunks Can Spray Musk Up to About Three Meters
Their oily spray is a defense that can linger for days.