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How Your Immune System Works
health.howstuffworks.com/human-body/systems/immune/immune-system.htm
Inside your body there is a mechanism designed to defend you from millions of bacteria, microbes, viruses, toxins and parasites that want to invade your body. Find out how the human immune system works.
How do ducks float?
animals.howstuffworks.com/birds/duck-float.htm
To understand why ducks float, you have to know a little about buoyancy, but that's not the sole principle at work. Learn why else ducks float.
Quetzalcoatlus: The Largest Flying Creature in Earth's History
animals.howstuffworks.com/dinosaurs/quetzalcoatlus.htm
Quetzalcoatlus northropi wasn't just big; it was ginormous! As the largest flying animal yet discovered, Quetzalcoatlus continues to fascinate paleontologists and average people alike.
There's More to Cannibalism Than Just People Eating People
people.howstuffworks.com/different-types-cannibalism.htm
Are there different types of cannibalism? Learn more about cannibalism in this HowStuffWorks Now article.
Do You Really Need to Brush Your Dog's Teeth?
animals.howstuffworks.com/pets/brush-dogs-teeth.htm
Brushing your dog's teeth might be a bit unpleasant for both of you, but it will keep your furry friend healthier longer.
How are tooth roots removed?
health.howstuffworks.com/wellness/oral-care/procedures/tooth-roots-removed.htm
Having tooth roots removed during a tooth extraction is fairly common. Learn about how tooth roots are removed.
What Is Porcelain, and Why Has It Been Cherished For Centuries?
home.howstuffworks.com/home-decor/decorating-styles-techniques/porcelain.htm
The Chinese have been making porcelain as far back as perhaps the first century. What is porcelain, exactly, and why did it take hundreds of years for the process to be duplicated anywhere else?
What Does Snake Poop Look Like?
animals.howstuffworks.com/snakes/what-does-snake-poop-look-like.htm
Maybe you're out in the wild and trying to identify some scat on the trail, or you're the new owner of a pet snake. Maybe you're just a curious sort. Either way, you're wondering, "What does snake poop look like?"
Are Abnormal Archaeological Finds Proof of Extraterrestrial Life?
Are strange skeletons unearthed across the globe evidence that we're not alone, or are they simply more myths and legends that are bound to be debunked?
What Was the Very First Toothbrush?
history.howstuffworks.com/historical-events/what-was-very-first-toothbrush.htm
The first recognizable toothbrush arose in the 15th century. Read a short history of the humble toothbrush at HowStuffWorks Now.