I found another interesting picture without the number, but couldn't investigate further because EU residents are denied access.
That's interesting! Did you find it on Google? I'm not sure we've had shutterstock pictures with the number on before. I looked for that image and went to its page, which recommended to me several similar images, one of which has a lot of video variations. This is one of them, I wonder if anyone ever used it. https://ak.picdn.net/shutterstock/v...lue-human-eye-to-a-neuron-cell-animation.webm It took me some time to find the number there!