Thunder Megaphone - A Glacial Valley Can Focus and Amplify Thunder Into a Most Extraordinary Sound
by
Chuck Bonner
Thunder is an impressive sound, but under some conditions it is utterly extraordinary. A glacial valley can focus and amplify the sound of thunder into something truly marvelous.
http://ezinearticles.com/?Thunder-Megaphone---A-Glacial-Valley-Can-Focus-and-Amplify-Thunder-Into-a-Most-Extraordinary-Sound
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