[meteorite-list] "Supergiant" Asteroid Impact

[Darren Garrison]

On Mon, 11 May 2009 13:01:28 -0700, you wrote:

>This raises the question that seems to be getting bigger and bigger. 
>What would such an impact do to Earth? 

An impact big enough to make a 2,000 mile crater?  Think the oceans boiled away
to their floors, everything bigger than a hydrothermal vent bacterium killed
instantly, and maybe them, too.