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Inventing a useful product or process is serious business — turn a great idea into a marketable widget, and you could earn millions of dollars. But that doesn't mean your widget has to be straitlaced and conservative.

The Aztecs, often associated with warfare and elaborate rituals, gave birth to a sophisticated system of government, remarkable artistic endeavors and a resilient language. Let's dive deeper into their remarkable contributions.

Agricultural biotechnology is the process of genetically engineering the food we eat. Learn about agricultural biotechnology.

Anthropology is the study of humankind. The U.S. distinguishes between biological, linguistic and social anthropology, as well as archaeology.

This Encyclopedia Britannica Literature & Language list features 12 novels that have been considered the greatest book ever written.

This Encyclopedia Britannica animals list features 8 animals that drink blood, human or otherwise.

For more information about fuel-saving device hoaxes and related topics, check out these articles.

What makes lampworking unique? Read about the art, technique and tools behind lampworking glass at HowStuffWorks.

Teeth straightening options for kids include braces, but there are other treatments as well. See five teeth straightening options for kids.

What traditions for new babies can create even brighter memories and afford parents much-needed breaks? Read about traditions for new babies at HowStuffWorks.