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Testosterone is one of the most important, but commonly misrepresented hormones found in the body. Learn about the role of testosterone.

Animal have some amazing skills. Read on to see which animals have the most amazing skills.

Cucumbers are known as one of the lightest and most refreshing fruits around. Take a look at the nutritional benefits of cucumbers.

For many, a stone wall is the most perfect solution for building. Learn how to build a stone wall in this article.

Isaac Newton is one of the most important contributors to the field of science. Learn about the life of Isaac Newton.

The story of Abby and Brittany Hensel, the world's most famous conjoined twins, has captivated audiences for decades.

Waterfall pictures depicting some of the most beautiful waterfalls in the world. Check out this collection of waterfall pictures.

The coyote inhabits most areas of North America. HowStuffWorks gets to know the 'song dog.'

The xoloitzcuintli is one of the most ancient of dog breeds and even was considered a guide to the underworld by the Aztec and Mayan civilizations.

Opossums are some of the most misunderstood animals. HowStuffWorks looks at some cool opossum facts.

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