The image above is not animated; it is not moving. The rotation of the “wheels” you are perceiving is due to your own eye movements. On steady fixation, the effect vanishes.

What to observe:

=continued=

My grandparents were from Hawaii, and would visit Las Vegas several times a year. It was their favorite playground. Each visit to the mainland they’d be sure to stop in L.A. for a few days to hang out with us, take us to Disneyland and Knott’s Berry Farm, and so forth. Good times. The best. =continued=