Search Results | HowStuffWorks

I have a dirt bike, and the exhaust pipe has this big bulge in it near the engine. What is the bulge for?

Theanine is found in green tea and has positive effects on anxiety. Learn about theanine, a supplement for soothing anxiety.

Work by volunteers and nonprofits, such as butterfly waystations and education efforts, has reversed population decline for some butterfly species.

The number 137, which is significant in multiple applications, has long been an object of fascination for physicists, mathematicians and mystics.

Perhaps no other beast has been more wildly mischaracterized in popular culture than the crested predator Dilophosaurus.

Was there a real Atlantis? Read about the search for the lost city of Atlantis and why it has obsessed scientists and historians for centuries.

A state's attorney has a lot of responsibilities. Visit HowStuffWorks to learn all about a state's attorney.

Klondike has almost become synonymous with solitaire in most people's minds. Learn how to play Klondike solitaire.

The idea of planet Nibiru, sometimes dubbed Planet X, has captivated doomsday prophets and conspiracy theorists for decades.

Has your tongue ever turned black and sort of hairy? HowStuffWorks looks at some causes.

Search Results | has