Here's a great optical illusion for a Friday
Tuesday, 20 July 2021
The great (and funny) astronomer Phil Plait ran this on his blog, Bad Astronomy .
Stare at it for a while. See the spirals?
Not so fast, there aren't any spirals.
Here are the circles, no longer spirals, in that first photo. It's funny. Even though I recognize that there aren't any spirals, my mind persists in seeing them none the much less.
Pretty cool. Phil picked it up from his friend Richard Wiseman. Richard Wiseman is another brilliant blogger. Wiseman's also a psychologist, magician and author. He writes the blog Richard Wiseman Blog. Trust me, it's a good deal more amusing than the title would suggest.