The above photo is one of the more momentous human achievements of the past few hundred years. On Dec. 17, 1903, 109 years ago, Orville and Wilbur Wright flew the first self-powered heavier-than-air craft—a flight that lasted 20 seconds, 120 ft— forever changing the world and technology as a whole.

Captured by John T. Daniels, the photo is significant because it's the exact moment when anything was possible. The military quickly enlisted the brothers to build Military Flyers, while the U.S. Post Office spawned the Air Mail Service in 1918. Now we have commercial airlines, insane military jets and aviation tech all thanks to the intrepid Wright brothers.

For a little more history on the remarkable event, head on over to the source link. And get a load of what the Wright brothers wrote to their father after their groundbreaking accomplishment:

Success four flights Thursday morning all against twenty-one mile wind started from level with engine power alone average speed through air thirty one miles longest 57 seconds inform Press home Christmas.