Manufactured optical illusion or fortuitous photography?
To thumb your nose at someone is a slightly
milder version of giving them the middle finger
Continue reading “Thumbing your nose – two practical jokes”
It’s deceptively simple.
For all of you who hate multiple choice tests, this will only confirm that your hatred is justified:
Continue reading “This math question just might fry your brain”
Was he a prank by the artist? Continue reading “This devil’s been hiding for over 700 years”
These are three normal gears
Normally, three gears connected to each other will rotate like the ones above. Continue reading “These gears move in a deceptive way”
"The firmest line that can be drawn upon the smoothest paper has still jagged edges if seen through a microscope. This does not matter until important deductions are made on the supposition that there are no jagged edges."
From The Note-Books of Samuel Butler by Samuel Butler, a 19th Century author
Continue reading “The problem of jagged edges”
Some paper has a noticeable "grain" –
folding or tearing it one way is easy,
but folding or tearing it against the grain
creates a rough, broken, inconsistent edge. Continue reading “The problem of bias”
(Click to enlarge)
It’s a static image, but you can’t stop your brain. Continue reading “The most moving optical illusion, ever”
At first you see graffiti.
But when you walk to the right spot… Continue reading “The Medusa animorph optical illusion”
They squirt the poo on you
Continue reading “The feces squirting scam”