Did you know: There is a whole world out there that we can't hear.
The most acute human ear can perceive frequencies as low as 20 hertz. Frequencies lower than that are called infrasound. Unbeknownst to us, the physical world throbs with infrasonic noise, a symphony of deep booms produced by thunder, air turbulence, jet engines, volcanoes, earthquakes, crashing ocean waves, and even shuddering buildings. Check it out at
http://m.discovermagazine.com/1992/apr/ ... ssilentc38Infrasound seems to be a mode of communication not only for elephants, rhinoceros, giraffes, okapi and whales but for some reptiles as well.When alligators bellow and make the water droplets shiver above their backs during mating season they are using infrasound to communicate. Male alligators produce aninfrasonic signal, termed subaudible vibrations, just prior to the audible bello. Check it out at :http://icb.oxfordjournals.org/cgi/content/abstract/29/3/1019
Snakes can hear infrasound through their bodies.They are very sensitive to vibrations. Snakes can sense a coming earthquake from 120 kilometres away, three to five days before it actually happens. They respond by behaving erratically. China is using them to predict earthquakes by setting up surveillance equipment at snake farms
http://www.impactlab.com/2006/12/27/the ... on-system/Some scientists beleive that the casque of the veiled chameleon may amplify the low frequency buzzing noises that these creatures use to communicate. This infrasonic communication was first described by Kenny Barnett and his colleagues in an article published in the journal, Copeia. (Barnett, K. E.; Cocroft, R. B.; Fleishman, L. J. Possible Communication by Substrate Vibration in a Chameleon. Copeia; 1999(1):225-228. 1999).
http://www.ppne.co.uk/index.php?m=show&id=28381
"You and I wear the dangerous looseness of doom and find it becoming. Life, for eternal us, is now; and now is much too busy being a little more than everything to seem anything, catastrophic included"- e e cummings