The Boeing 747's distinctive hump was designed to create a full-length cargo area for air freight. This feature allowed the iconic jumbo jet to be easily converted into a cargo plane, foreseeing a future where supersonic passenger travel might dominate, sidelining subsonic jets. The 747's adaptability not only revolutionized air cargo but also ensured its longevity in passenger service, it remains an aviation staple despite supersonic travel not becoming mainstream. Have any cool aviation facts to share? We'd love to hear your insights!