Good morning, everyone. Today we're going to look at the history of the bicycle. Now, you might think the bicycle is a fairly modern invention, but in fact, the first two-wheeled vehicle was created in 1817 by a German baron. However, it had no pedals. You had to push it along with your feet. It wasn't until 1860s that pedals were added to the front wheel. Around 1885, the 'safety bicycle' was developed, which had a chain drive to the rear wheel, making it much safer and more efficient. This design quickly became popular and is the basis for most modern bicycles.
❓ ¿Cuál fue la principal mejora de la 'bicicleta de seguridad' introducida alrededor de 1885?
A. A. No tenía pedales.
B. B. Utilizaba una transmisión por cadena hacia la rueda trasera.