It is quite a mystery to everyone, including scientists, how we can tell the difference between the male and female face. So which of the above pictures is male and which is female?
Most people say the one on the right is male and the one on the left is female. Fact is that they are the same picture just that the contrast has been changed. Crazy eh?
Our favourite presenter from the BBC's Click gets the Upside Down treatment. Click or hover to reveal.
Scientists have discovered a new optical illusion that will screw up your brain big time. Focus on the red cross while the dots move. They are wriggling around, right? Wrong. All of them are moving "in straight trajectories and random directions without colliding." Via Sploid
A thaumatrope is a toy that was popular in the 19th century. A disk with a picture on each side is attached to two pieces of string. When the strings are twirled quickly between the fingers the two pictures appear to blend into one due to the persistence of vision
No, your eyesight isn't getting worse, these trees are in focus but appear blurred, it's an optical illusion. The trees are primarily Noble firs and are a part of the Weyerhaeuser Mount St. Helens tree farm. Their blurry appearance apparently stems from the symmetrical growth patterns that are primarily due to pruning and trimming practices used to produce high-grade lumber free of knots.
Image source Matt Read
Stare at the black cross on the left hand image for 30 seconds and then at the right hand image. Can you see what appears?
OK, so this guy isn't really a giant, if you look carefully you will notice that he is standing on a ledge up above all the people in the background. But it does make you look twice, doesn't it? Image source unknown
Optical Illusion Website
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