I thought some of you might find this of interest:
http://www.space.com/businesstechnology/070410_technovel_asteroidcomp.html
"...An asteroid just 200 meters in diameter hitting one of Earth's oceans
could cause tsunamis around the world. The largest asteroid strike in
recent human memory, at the
<http://www.space.com/scienceastronomy/planetearth/tunguska_mystery_011031.html>Tunguska<http://www.space.com/scienceastronomy/planetearth/tunguska_mystery_011031.html>
River in Russia, felled 80 million trees over an area of 2,150 kilometers.
That object's size has been estimated at about 50 meters in diameter."
Mal
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