A bicycle, or bike, is a pedal-driven human-powered vehicle with two wheels attached to a frame, one behind the other. First introduced in 19th-century Europe, bicycles evolved quickly into their familiar, current design. Numbering over 1,000,000,000 in the world today , bicycles provide the principal means of transportation in many regions and a popular form of recreational transport in others.

The bicycle is one of the most notable of human inventions. The basic shape and configuration of the frame, wheels, pedals, saddle and handlebars has hardly changed since the first chain-driven model was developed around 1885, although many important detail improvements have been made since, especially in recent years using modern materials and computer-aided design.

A remarkable aspect of the bicycle is its widespread adoption in many different fields of human activity, e.g. as a child's toy, in adult recreation and fitness, as a means of everyday transport, in cyclo-touring, for use in many cycle sports, and as a basis for static gymnasium or home fitness versions.

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@londoncyclist Well be prepared for lots of people on bicycles! In all ages. You should also check out Denmark Odense and CPH in particular.
girlinthecafe (thegirlinthecafe) Thu, 07 Jan 2010 14:54:51 -0000
@londoncyclist Well be prepared for lots of people on bicycles! In all ages. You should also check out Denmark Odense and CPH in particular.
Interesting fashion Show Sonia Rykiel's Underwear Fair: Brassieres, Bicycles, Ducks And Chandeliers (PHOTOS) http://bit.ly/70anLu
spooney35 (Maverick Johnson) Thu, 07 Jan 2010 14:33:49 -0000
Interesting fashion Show Sonia Rykiel's Underwear Fair: Brassieres, Bicycles, Ducks And Chandeliers (PHOTOS) http://bit.ly/70anLu
RT @meat99: Celebrities riding invisible bicycles. http://bit.ly/sDFT2 Love it.
waringdesign (waringdesign) Thu, 07 Jan 2010 14:31:40 -0000
RT @meat99: Celebrities riding invisible bicycles. http://bit.ly/sDFT2 Love it.
RT @meat99: Celebrities riding invisible bicycles. http://www.holytaco.com/celebrities-riding-invisible-bicycles I'm just sayin'
benmooge (benmooge) Thu, 07 Jan 2010 14:26:55 -0000
RT @meat99: Celebrities riding invisible bicycles. http://www.holytaco.com/celebrities-riding-invisible-bicycles I'm just sayin'
Celebrities riding invisible bicycles. http://www.holytaco.com/celebrities-riding-invisible-bicycles I'm just sayin'
meat99 (Tom Ajello) Thu, 07 Jan 2010 14:24:58 -0000
Celebrities riding invisible bicycles. http://www.holytaco.com/celebrities-riding-invisible-bicycles I'm just sayin'
@justinecaul Sounds fun though :-) Seen the video? They were skating on modified bicycles, chairs, etc. Very strange!
TechboyUK (Paul Richardson) Thu, 07 Jan 2010 14:14:43 -0000
@justinecaul Sounds fun though :-) Seen the video? They were skating on modified bicycles, chairs, etc. Very strange!

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