Bat: They are capable of using echolocation to find their food. An echo is the bouncing back of sound from an object. Here, a bat is using sound waves which are more than 20 kHz in frequency. Bats can release and trace these waves and use to identify its surroundings. If we can replicate the bats’ vocal chord to make a machine which can be attached to a pair of glasses, and the replica of the bats’ auditory cortex(part of the brain where this information is analysed), through wires connected to the brain we can make the person see,. Platypus: This animal and the shark, both use electro- location to identify their surroundings. By using the front part of their body (where the nose is present) these animals send and receive electrical pulses to find moving objects like food. If we can make such electro receptors and attach them to a central processor, then further to the brain the person can actually understand what he/she is holding. Snakes: The snakes have a special membrane under their eye sockets which is heat sensitive. By using this, the snake is able to identify warm-blooded (it’s food) and cold-blooded (mostly obstacles) animals coming in its path. This is called infra-red vision. We use this technology in infra-red cameras too. Today we are capable of making cameras the size of buttons. So, if we can make cameras the size of the human eye, we can actually (try) replace the blind person’s eye.
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