A very interesting test of cognition - can you count the basketball passes?
And here is an optical illusion that demonstrates an interesting quirk in our visual perception
Here is a wide selection of fascinating optical illusions
@MKupperman Couldn’t achieve all this without your peppy oversight
Birds of a feather https://t.co/OIpm3OgfTp
@AlasdairMangham Never seen it! Great, going to add to my list :)