bicycle

A bicycle is a vehicle with two wheels that is powered by the rider's legs. It is a type of human-powered transport.

Bicycles are made up of a frame, two wheels, a saddle, handlebars, and pedals. The rider sits on the saddle and pedals the cranks, which turn the wheels. The wheels are connected to the frame byaxless.

Bicycles are a popular form of transportation for people of all ages. They are also a great way to get exercise.

In science, bicycles can be used to study human physiology, aerodynamics, and engineering. For example, scientists might use bicycles to study how the human body works when it is exercising, or how the aerodynamics of a bicycle affect its speed.

I ride my bicycle to work every day.