Everyone knows that woodpeckers build their nests by pecking tree trunks. The point many people do not consider is how woodpeckers undergo no brain haemorrhage when they so strongly tattoo with their head. What the woodpecker does is in a way similar to a human driving a nail in the wall with his head. If a human ventured to do something like that, he would probably undergo a brain shock followed by a brain haemorrhage. A woodpecker, however, can peck a hard tree trunk 38-43 times between 2.10 and 2.69 seconds and nothing happens to it. Nothing happens because the head structure of woodpeckers are created as fit for this job. The woodpecker’s skull has a "suspension" system that reduces and absorbs the force of the strokes. There are special softening tissues between the bones in its skull. Next : The Sonar System of Bats Send Comments and Suggestions to mkaramete@usa.net |
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