I found out this is an example of: long exposure photography
Long exposure photography:
The beauty in the still world has long been explored, but what about the moving world? Using long exposure photography, artists can take a snapshot of time, combining all the movements in the camera's view into one frame. Some photographers use the technique capture the natural world, some the city life, and others create light art using steel wool or glow sticks. Here are 120 pictures that show the incredible moving world.
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