Turn the fish puzzle
Eight matchsticks?Ç are arranged to form a fish swimming to the left as shown on the right. Can you make it swim to the right by moving 3 sticks??Ç
Click here if you are unable to solve it! You can also download a printable PDF version here. This puzzle was probably first devised by the famous puzzle guru in Japan – Kobon Fujimura
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Cool optical illusion – Rotating snakes!
Yesterday I came across this cool optical illusion page. Whenever you move your eye, it appears that the circles are rotating. But if you keep your eye steady for sometime you realize that it is just an illusion!
This is called peripheral drift illusion. This is generated by presentation of a sawtooth luminance in the visual periphery.
Further Reading
Akiyoshi’s illusion pages
Peripheral drift illusion