Expanding mist (not an animated image).
#opticalillusion
@freemo looks still to me.
It is odd how some of these don't work on kids. I think we eventually learn some shortcuts for our vision.
@jmw150 seems this one only works on some people. Interesting indeed.
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.
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