Another example of the blurring of reality is ESP. Believers in ESP claim to have the ability to obtain information without using the physical senses. Although this ability has never been proven by science; most people have experienced hunches, gut feelings, premonitions, intuition or other unexplainable ways of “just knowing” something. Again, this only adds to the uncertainty of reality. Besides these false impressions our senses disregard much of “reality”. Dogs can hear ultrasound. This is how 'silent' dog whistles work. Dogs have a nose approximately a hundred thousand to a million times more sensitive than a human's. Some bats use ultrasound for echo location while in flight. Dolphins have their own sonar based sense. Bees are sensitive to the polarization of light. Back to optical illusions: There is no actual movement in the above design. This illusion was developed by Professor Akiyoshi Kitaoka at the Departm...
