Today's lecture is about the history of the bicycle. The first bicycle, called the 'draisine', was invented in 1817 by a German baron. It had no pedals; riders pushed their feet against the ground to move. In the 1860s, the 'velocipede' appeared in France, with pedals attached to the front wheel. However, it was nicknamed 'the boneshaker' because of its uncomfortable ride on rough roads. The 'high wheeler' or penny-farthing, popular in the 1870s, had a huge front wheel for speed, but it was dangerous. Finally, in 1885, the 'safety bicycle' was introduced, with two equal-sized wheels and a chain drive, making it much safer and more practical for everyday use.