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Bipolar disorder, also called manic-depressive disorder, affects millions of Americans. Learn about mania, mood swings and how bipolar is treated.

Preventing sexually transmitted diseases is simply a matter of being prepared and using your head. Learn how to treat and prevent various STDs.

Pirates have sailed the seas for hundreds of years. Learn about pirates and find out if you have what it takes to live the pirate lifestyle.

Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.

Male puberty marks one of the most awkward times in a boy's life. Learn what changes happen during male puberty and all about male puberty hormones.

Suicide bombers use a unique form of terrorism in order to advance their message. Learn about suicide bombers.

Ever wonder how to vacation with your pet? Learn all about how to vacation with your pet at Animal Planet.

10 eco-friendly substitutes for plastic is discussed in this article from HowStuffWorks. Learn about 10 eco-friendly substitutes for plastic.

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Scientific peer review is a quality-control system that critiques all new scientific discoveries. Learn more scientific peer review and its flaws.

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