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These 10 hospitals have the best doctors and facilities in the United States. See what makes Johns Hopkins, Mayo Clinic and others the best hospitals

Think you can't have cheese or steak to eat a healthy diet? We're here to tell say you can. With some stipulations, of course.

Get ready to put your knowledge of biology to the ultimate test! Try to match all of these animals to their correct phylum with this science quiz!

Autism spectrum disorders is a group of disorders with similar symptoms. Learn more about autism spectrum disorders from Discovery Health.

Learn more about the rare and unusual mental disorder, Cotard's Syndrome.

What do you do if your teen can't sleep? Learn what to do if your teen can't sleep in this article.

Tiny starfish larvae get food and swim by creating swirls of water. See the starfish in action at HowStuffWorks Now.

Narwhals, the unicorns of the sea, are unusual tusked whales who like icy ocean waters. See what else makes narwhals interesting whales indeed.

What are nuns? Do they really wield rulers while singing and dancing like in the movies? Read more about nuns at HowStuffWorks.

Police sketches are a routine part of law enforcement investigations. Read more about police sketches at HowStuffWorks.

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