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How Cave Dwellers Work

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Cave dwellers are stereotyped as heavy-browed and dim-witted. But who are the real cave people? Read about cave dwellers and their subterranean lives.

Why Is Octopus Blood Blue?

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Octopuses have blue blood, not red blood like most other mammals. Find out why scientists think octopus blood is blue at HowStuffWorks.

Why Fruit Flies Were the First Animals in Space

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The little flies have way more in common with us than you think. And it made them the perfect test animal to send to space.

How Lust Works

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What is lust? How does it help promote long-term mating? Read about lust at HowStuffWorks.

All About the Hoop Snake: Separating Fact From Fiction

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The hoop snake, a creature of legend, has captivated imaginations for generations with its alleged behavior. Said to grasp its tail in its mouth, forming a perfect hoop, this serpent supposedly rolls like a wheel at incredible speeds, chasing down its prey.

River-bottom Bones: The Strange World of Underwater Fossil Hunting

science.howstuffworks.com/environmental/earth/geology/underwater-fossil-hunting.htm

Not all fossils are found on dry land. In fact some of the most fascinating fossil finds in history have been submerged for centuries.

How Fossils Work

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Fossils can tell us how life on Earth has evolved over time and also how the climate has changed. Find out what fossils are and how fossils formed.

Can You Name These Countries With Mostly Red Flags?

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Red for valor. Red for bravery. Red for life, for passion, for blood and for honor. Sometimes red is even for luck. Countries all around the world use red in their flags, so how many do you think you can identify? Run this quiz up the flagpole and see who salutes!

5 Plaque Removers That Really Work

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When hardened plaque builds up on your teeth and turns into tartar, your risk of gum disease increases. Learn about 5 plaque removers that really work.

Does the Immortal Jellyfish Actually Live Forever?

animals.howstuffworks.com/marine-life/immortal-jellyfish.htm

The immortal jellyfish, known as Turritopsis dohrnii, has the ability to reverse age and theoretically live an eternal life. Because of its ability to regrow its cells, it could theoretically escape death over and over again.

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