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’Hole in sky’ amazes scientists
A giant hole that appeared in a uniform layer of cloud over Mobile, Alabama, in the US, has produced some intriguing photos. Meteorological experts believe the hole formed when ice-crystals from a passing plane fell through the cloud, causing the water droplets in it to evaporate. Experts say the process involved is related to that of cloud seeding, which is used to make rain over crop fields. Strictly speaking there is no scientific term for the apparition, and what exactly it is has been the subject of much meteorological speculation.
Interesting photo
Posted by: TS 2004-01-19
http://www.rantburg.com/poparticle.php?ID=24649