Sound 'cause of shadow spectacle'

[Rick]

Mysterious bands of shadow which sometimes pass across the ground during an eclipse might be produced by sound pulses, according to a new theory.

"Shadow bands" have been observed travelling across the ground before and after totality - when the Moon completely covers the Sun.

Many attribute these regular light and dark bands to atmospheric turbulence.

More: http://news.bbc.co.uk/2/hi/science/nature/7347180.stm