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The Smallest Animal in the World Weighs Less Than 1 Milligram

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The natural world is home to some incredibly tiny creatures. From miniature mammals to tiny amphibians, many of the smallest animals in the world weigh less than a grape and are smaller than an average 5-year-old's hand.

Amazing Animals: Great White Shark Quiz

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They are the most notorious species of shark, boasting 3,000 jagged teeth and a bite that kills. See how much you know with this quiz.

Narwhal Echolocation Abilities Exceed Those of Any Other Animal, Study Finds

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What are the echolocation abilities of a narwhal? Learn more about a new study on narwhal echolocation in this HowStuffWorks Now article.

Have doctors ever found teeth in a vagina?

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Vagina teeth are the stuff of legends - but is it possible for a woman to have teeth in her vagina? The answer might surprise you.

Do You Know the 35 Hardest Plurals in the English Language?

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Just add an "s" and a singular noun becomes a plural, right? Although for the most part, just adding an "s" holds true, but there are exceptions. Do you know them all?

Iguanodon Skeletons Are the Most Complete of Any Dinosaur

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Hey there, dinosaur fans! Let’s talk about one of the most fascinating extinct animals of all time: Iguanodon! Discovered in the early 19th century, Iguanodon was one of the very first dinosaurs ever named, and it played a huge role in kicking off the field of paleontology. With its iguana tooth-like structures and unique anatomy, this medium-sized herbivorous dinosaur became an instant sensation for scientists and dinosaur lovers alike.

How Odometers Work

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Mechanical odometers have been counting the miles for centuries. Although they are a dying breed, they are incredibly cool inside. Learn how this simple device tracks distance and find out about digital odometers.

Is gingivitis deadly?

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Is gingivitis deadly? Take a look as we break down the dangers of plaque and find out if gingivitis is deadly.

How Often Should You Replace Your Toothbrush?

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When was the last time you replaced your toothbrush? And how often should you?

Famous Urban Legends Quiz

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How much do you know about ghoulish myths from around the world? Take this quiz to find out!

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