Contrails are streaks of condensed water vapor left behind by airplanes. But did you know that contrails can also be used as a form of artistic expression?
Some scientists have used contrails as a tool to study the Earth's atmosphere, while others have used them as a canvas for their art.
But can contrails be used as a form of secret communication? We'll never tell.
Did you know that contrails have been a part of human culture for decades? From contrail-covered mugs to contrail-shaped cookies, people have been fascinated by these wavy wonders.
Some have even used contrails as a form of protest, like the infamous Contrail-ists who used them to spell out "STOP THE AIRPLANE" across the sky.
But can contrails really change the world? We'll never tell.