1. Perception Does it really tell us what is out there? Fire Hand perception of pain Sky Eye perception of blue Coke Tongue sensation of sweetness
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7. “ Two thirds of what we see is behind our eyes” Chinese proverb
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10. Our eyes have evolved to process a small portion of electromagnetic radiation, which runs from sound waves to UV, and up to Gamma Rays. Our eyes only detect a sliver of the entire range of electromagnetic radiation. We call that sliver the visible spectrum. So we can see wavelengths between about 400 and 700 nanometers (all the colours of a rainbow), but we can't see Infrared or Ultraviolet.
11. It has recently been shown that the Kestrel is able to see in the near ultraviolet . This allows them to detect the urine trails around rodent burrows, which reflect ultraviolet light Bottlenose dolphins respond to tones within the frequency range of 1 to 150 kHz. (The average hearing range for humans is about .02 to 17 kHz). Echolocation is a type of sonar that bats use to detect prey, locate roosting crevices and avoid close obstacles in the dark. These bats emit a very loud and short 'shout' of sound and listen for the echo that bounces back when it hits an object Mosquitos are especially sensitive to carbon dioxide, using it to track food sources and assess their surrounding environment," “Every man takes the limits of his own field of vision for the limits of the world” Arthur Schopenhauer 1788-1860 Try to imagine a new colour.
39. If the brain is used to things appearing smaller the further away they are, how come the sphere in the distance (right) looks bigger than the other when in fact it is the same size?
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59. Close your left and eye and just focus your right eye on the tiny cross. At some point the big circle will disappear as it crosses your 'blind spot'. If you can't see this effect, then try sitting closer/further from the screen.
75. Who is Jean de Dinterville? Well, he was a French nobleman who came to England as an ambassador in the 1530s. He was one of the two people shown in a famous painting by Holbein - he is the figure on the left.
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91. Click on image above, then scroll down until you see this image. Follow the short instructions above it.
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94. Look at the four points for thirty seconds then close your eyes and shake your head gently
121. Missouri mussels The mussel uses a lure to attract a host fish (smallmouth bass) to carry its parasitic larvae. The lure is a remarkable mimic of a small fish in color and movement. When the bass strikes at the lure, the female mussel releases hundreds of tiny larvae that attach to the gills of the bass.
