Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but its origins actually go back further. In 1817, a German inventor named Karl Drais created a two-wheeled contraption called the 'draisine'. It had no pedals; riders pushed their feet against the ground to move. Then, in the 1860s, pedals were added to the front wheel in France, leading to the 'velocipede'. However, it wasn't until the 1880s that the chain-driven rear wheel design, similar to modern bikes, became popular. This design made cycling safer and more efficient.
❓ According to the lecture, when was the chain-driven rear wheel design introduced?