<<T he grains of sand come down in bunches over an area of a few miles
wide. They survey, store up information, and wait for a storm system to
swing overhead. They use the storm's electrical potential to trigger
lightning strikes that they use to send a tightbeam burst message using
the earths atmosphere as a highpower radio transmitter. The power demand
to accomplish this naturally causes a forest fire that destroys the
probe,and the fire is blamed on lightning. >>
TUNGUSKA!!
(Sorry...the temptation was overwhelming)
EvMick