Flying is the act of moving through the air using wings or other means. Birds, insects, and some mammals, like bats, are natural flyers. They use their wings to generate lift, allowing them to soar, glide, or hover. Humans have also developed technology, such as airplanes and helicopters, to achieve flight. The principles of flight involve aerodynamics, which is the study of how air interacts with solid objects. Key factors include lift, weight, thrust, and drag. Airplanes use engines to create thrust, while their wings are designed to produce lift, enabling them to travel long distances in the sky.