Airflow over a planes wing in flight.
The wing of an airplane is vital for the craft to fly, as it provides the necessary lift to get the vehicle off the ground and to keep it in the air. From the side, airplane wings are curved into a teardrop shape so that the airflow is distributed with higher air pressure being higher on top, causing the air to try and go upwards towards the lower pressure zone, causing lift. This is the force that is constantly battling gravity, or the Earth's natural pull that causes objects to fall. The pressure difference is a very exact science, as too much can cause instability and not enough can cause the plane to crash into the Earth. Wings have been used in many different shapes and forms to try and appeal to different uses of the plane. For example, the commercial aircraft's wings are made to maximize in efficiency and speed, while military jets wings are made for mobility and to stay attached at incredible speeds. The shape of a wing can even help render the plane invisible, as seen in the picture below.