This animated optical illusion looks like a circle of dots but every dot is simply moving in a straight line

@Scienmag over on Twitter has spotted this great optical illusion:

Seriously. It looks like a circle rotating inside another circle but train your eye on an individual dot and watch it move backwards and forwards along the spokes.

And as ‏@karriinaaxo says, “this fucked with my mind”

Source: Twitter/@scienmag