Swept wings are a design feature found on many aircraft, where the wings are angled backward from their root to the tip. This design helps to reduce drag at high speeds, allowing the aircraft to fly more efficiently. Swept wings are commonly used in military jets and commercial airliners, as they improve performance during supersonic flight. The concept of swept wings was first developed during World War II and has since become a standard in modern aviation. Aircraft like the Boeing 747 and the F-16 Fighting Falcon utilize this design to enhance stability and maneuverability, especially at higher altitudes and speeds.