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Invented by the [[Scotland|Scottish]] [[chemistry|chemist]] and visionary [[Dudley D. Watkins]], the bicycle (originally called the perambulobulator) is a two-wheeled [[conveyance]] whose power source is the calorific conversion of the machine's operator.
There are several types of bicycle commonly in use today including the [[mountain bike]], the [[road bike]], the [[safety bicycle]], the [[BMW]], the [[feminine convenience]], the [[saddleless rim burner]], and the [[Siberian bicycle tractor]].
The bicycle has been called the most efficient means of transport yet devised.{{fact}}