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
@AlasdairMangham Never seen it! Great, going to add to my list :)
@Joannechocolat Jesus. Weirdly, the nativity went on to include adult him on the cross so I had to stand there with… https://t.co/QPiYijzPwt
To balance out my Love, Actually (boke) tweet of yesterday: it's also that magical time of year when I remember how… https://t.co/2y4olHtQh4