In 1817, it was invented by as the ‘running machine’ as a high powered replacement for a horse. Although it did have the same look of a modern day bicycle, it had no pedals so it was propelled by running instead.
One of the first models to be called a ‘bicycle’ was invented in the 1870s with a high front wheel and a metal seat with pedals. The modern day version with similar sized wheels was invented in the 1880s. Of course, popularity skyrocketed in the 20th century with further improvements arriving in the form of a scooter, motorcycle, mountain bikes and those used for extreme sports.