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Why do people yell 'Play 'Freebird'' at concerts? Read about the origins of the 'Free Bird' call at HowStuffWorks.

Everybody's stomach makes noises. Whether you call it growling, grumbling or gurgling, what is that sound and what is it trying to tell us?

Wiretapping allows people to listen to the phone calls of others. Learn how wiretapping works, wiretapping history and about wiretapping techniques.

A BBQ lighter uses something called piezoelectricity to generate a nice spark that lights the grill. Learn how the lighter in a BBQ works.

A new geometric shape called the "einstein" shape has been discovered and when you tile it, no repeating pattern emerges.

Homer Simpson's favorite snack was once called 'oily cakes.' Find out more about this and other fun facts on doughnuts.

In the 1950s and 60s, a drug called thalidomide was marketed as a miracle solution for morning sickness and sleep issues in pregnant women.

Does colloidal silver cause blue skin? Learn about the condition called argyria and if colloidal silver creates blue skin.

Is the undercover program called PRISM actually a fairly transparent tool for gathering information or a mandate for snooping through your e-mail?

Groupon has been called the fastest-growing company in history. Learn how Groupon works and what Groupon is all about.

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