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Your search for "vertebrate" returned 150 results
3 Types of Dinosaurs and Their Many Subtypes
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Types of dinosaurs include the lizard-hipped dinosaurs and the bird-hipped divisions of dinosaurs. Both of these types of dinosaurs probably shared a common ancestor during the Middle Triassic. How else are these dinosaurs related?
How Tardigrades Work
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No, a tardigrade's not a type of time-traveling police box on "Doctor Who." It's an ancient water bear, of course!
How Houseflies Work
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Though houseflies scavenge and carry disease, houseflies also provide food for the local ecosystem. Learn why houseflies love the great indoors.
10 Weird Facts About Lobsters
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Lobsters pee out of their faces. Find out 10 weird facts about lobsters at HowStuffWorks.
How Animal Testing Works
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Animal testing has a long, gruesome history, but it's also saved countless human lives.
10 Cretaceous Animals That Weren't Dinosaurs
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The dinos hog all the Cretaceous headlines. Do you have any idea what else scurried, hopped and otherwise cruised around Earth before the K-T mass extinction?
How Earthworms Work
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Earthworms aren't just good for fish bait. Read about earthworm anatomy, reproduction and life as an earthworm at HowStuffWorks.
How the 'Alien' Xenomorph Works
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You've always wondered how the xenomorph in 'Alien' worked. Now it's time to go behind the scenes and meet the xenomorph in 'Alien.'
Top 30 Smartest Animals in the World
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Humans aren't the only animals that can count, use logic, make tools or form lasting bonds with others. Meet 10 of the smartest creatures in the animal kingdom.
How Evolution Works
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Evolution is fascinating because it attempts to answer one of the most basic human questions: Where did life, and human beings, come from? The theory of evolution proposes that life and humans arose through a natural process.