Humans dreamed about flying for thousands of years. Then, in a little more than a century, we went from a 12-second hop over a North Carolina beach to aircraft traveling more than three times the speed of sound. In honor of National Aviation Day, celebrated every August 19 on Orville Wright’s birthday, here are 10 aviation facts that might make your next flight seem a little more amazing.

1. The Wright Brothers’ First Flight Lasted Just 12 Seconds

On December 17, 1903, Orville Wright piloted the Wright Flyer for 12 seconds and traveled only 120 feet at Kitty Hawk, North Carolina. That’s shorter than the wingspan of many modern passenger jets. The brothers made four flights that day, with Wilbur making the longest: 852 feet in 59 seconds. Pretty humble beginnings for an invention that would completely change the planet.

2. Their Airplane Had Only 12 Horsepower

Your lawn tractor may be feeling pretty smug right now. The 1903 Wright Flyer was powered by a 12-horsepower, four-cylinder engine driving two propellers through a chain-and-sprocket system. The entire aircraft weighed only about 605 pounds empty.

3. Amelia Earhart’s First Famous Atlantic Crossing Was as a Passenger

Amelia Earhart became the first woman to fly across the Atlantic Ocean in 1928, but here’s the part people sometimes miss: She wasn’t the pilot. Wilmer Stultz and Lou Gordon flew the aircraft from Newfoundland to Wales while Earhart traveled as a passenger. She had been promised some time at the controls but didn’t get it during the Atlantic crossing. Earhart wasn’t satisfied with merely being along for the ride. Four years later, she flew across the Atlantic alone, becoming the first woman and only the second person after Charles Lindbergh to make a solo nonstop transatlantic flight.

4. Chuck Yeager Broke the Sound Barrier With Broken Ribs

This sounds like something Hollywood would add to make the story more dramatic. It actually happened. On October 14, 1947, Air Force Capt. Chuck Yeager became the first person to fly faster than the speed of sound in the rocket-powered Bell X-1. A horseback-riding accident just days earlier had left Yeager with two broken ribs. He kept the injury largely secret because he didn’t want to be removed from the flight. The X-1 reached Mach 1.06 at roughly 43,000 feet.

5. The First Supersonic Flight Was Initially Top Secret

Yeager had just accomplished one of aviation’s greatest milestones. Naturally, the government responded with:

Nobody tell anybody.

The Air Force classified the flight and its data as Top Secret shortly after it happened. News eventually leaked, but the Air Force didn’t officially confirm the accomplishment until March 1948.

6. The SR-71 Could Fly More Than 2,200 MPH

The legendary SR-71 Blackbird could fly at speeds exceeding 2,200 mph, or more than Mach 3.

It could also operate above 85,000 feet.

At that altitude, you’re more than 16 miles above Earth.

Decades after its development, the Blackbird remains one of those machines that looks like somebody accidentally delivered an aircraft from the future.

7. Those White Lines Behind Airplanes Are Mostly Ice Crystals

You’ve seen them stretching across the sky.

They’re called contrails, short for condensation trails.

Hot, moist aircraft exhaust mixes with extremely cold air high in the atmosphere. Water vapor condenses and freezes, producing tiny ice crystals that create the visible white trail.

Some disappear within seconds or minutes. Under the right atmospheric conditions, others can persist much longer and spread into cirrus-like clouds.

8. Thousands of Airplanes Can Be Flying Over America at Once

The sky may look pretty empty from your backyard.

It isn’t.

According to the FAA, it handles an average of about 44,000 flights every day, with roughly 5,500 aircraft in the sky during peak operational periods.

The FAA oversees about 5.3 million square miles of domestic U.S. airspace.

Think about coordinating that the next time you’re annoyed because your flight has to wait three minutes before taking off.

9. Aviation Went From Kitty Hawk to the Space Age In One Lifetime

Consider the timeline.

1903: Wright brothers achieve powered flight.

1947: Chuck Yeager breaks the sound barrier.

1960s: The experimental aircraft programs and aeronautical research pioneered by NACA and NASA help lay foundations that contribute to America’s space program.

The technology went from wood, fabric and a 12-horsepower engine to supersonic experimental aircraft and spacecraft development within just a few generations.

That’s an absolutely ridiculous rate of technological progress.

10. The Wright Brothers Didn’t Just Build an Airplane

Their biggest contribution wasn’t simply getting something off the ground.

Wilbur and Orville spent four years researching and developing their airplane. Along the way, they used techniques including wind-tunnel testing and systematic flight testing that helped establish principles of modern aeronautical engineering.

In other words, they didn’t merely invent a successful flying machine.

They helped develop a better way to figure out how flying machines should be built.

✈️ From 12 Seconds to an Aviation Revolution

That first powered flight in 1903 lasted less time than it probably took you to read this paragraph.

Today, tens of thousands of flights move through American airspace every day, passengers routinely cross oceans in hours, and aircraft can travel several times the speed of sound.

Not bad for an idea people spent thousands of years believing might be impossible.

What aviation fact blows your mind the most?