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Diving bell spider: The only aquatic arachnid that creates a web underwater to live inDiving bell spiders are also weird when it comes to sex, with males occasionally gobbling up females in reverse sexual cannibalism.
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Aldabra rail: The bird that came back from the dead by evolving twiceThe flightless Aldabra rail went extinct 136,000 years ago when its atoll home sank beneath the waves. Then it evolved again.
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Indian giant squirrel: The 'rainbow' rodent that is also the world's largest squirrelIndian giant squirrels, with their extraordinarily colorful fur, are found in forests and woodlands of India.
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Loggerhead shrike: The brutal 'butcherbird' that impales its prey on barbed wireLoggerhead shrikes can kill prey bigger than themselves by stabbing and shaking them, before impaling them on sticks to eat later.
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Paradoxical frog: The giant tadpole that turns into a little frogParadoxical frogs — also known as shrinking frogs — are about three times bigger as tadpoles as they are when adults.
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Tufted ground squirrel: The Borneo rodent once believed to disembowel deer and feast on their organsThe forests of Borneo are home to squirrels with extravagant tails and teeth so sharp they could slash a deer's throat — and folklore has it that's exactly what they use them for.
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Sand striker: The glittering 'bobbit' worm that chops fish in half with its retractable jawsSand strikers — also known as bobbit worms — reach up to 10 feet long. They have razor-sharp jaws they use to catch unsuspecting fish and can split into bits to regenerate.
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Clouded leopard: The cat with saber-like teeth that can walk upside down in treesClouded leopards can rotate their ankle joints by almost 180 degrees and they kill prey by biting the back of their necks with their huge teeth.
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Ocean pout: The fish with antifreeze bloodOcean pout live in frigid waters from Labrador in Canada to North Carolina and have evolved a blood protein that serves as antifreeze.
