Time and perception
This photo is what is commonly called a time stack. I do a lot of time-lapse photography. I love it because my human perception is so time-based. I often don't notice the incredible beauty of the clouds billowing up as they seem to stand still. But compress several hours down to 15 seconds and the clouds suddenly seem alive. Time-lapse photography is sequential photographs, which allow for very high resolution, then each individual frame is used as a frame in the video. There are two advantages to doing a video like this. 1) high resolution, its easier to get a higher resolution with cheaper equipment. 2) controlled exposure, I can do a 40-second exposure so that I can get a proper photo of the Milkyway or whatever. See the link for the video below.
A time-stack is when you compress all of those photos into one image, using a special technique of blending each photo into the next. The results can be boring or amazing depending on the colors and movement. I find sunsets and sunrises to be the best for doing this. The photo here is some 400 images blended one into the next to create this hyper-saturated look and streaky look of where the clouds are moving. One photograph, 30 minutes compressed into a single image. It's funny how our perception is very time- based. Einstein is reported to have explained his theory of relativity like this, "When you kiss someone you love, ten minutes can seem but a few seconds and when you put your hand on a hot stove, a few seconds can seem like ten minutes." All things are relative to perception. One image: 30 minutes of time compressed.