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[[Image:Bicycle.jpg|right|thumb|300px]]
[[Image:Bicycle.jpg|right|thumb|300px]]
A '''bicycle''' is a human-powered, two-wheeled conveyance that serves as a popular means of transportation in many nations, and a form of recreation virtually world-wide.
A '''bicycle''' is a human-powered, two-wheeled conveyance that serves as a popular means of transportation in many nations, and a form of recreation virtually world-wide.
The bicycle has been called the most efficient means of transport yet devised, with over 90 percent of the cyclists energy effectively applied to turning the wheels
The bicycle has been called the most efficient means of transport yet devised, with over 90 percent of the cyclists energy effectively applied to turning the wheels
[[category:technologies]]
[[Category:Technology]]