Reply #70: radioactive - probably not

[MockSwede]

lots of boulders to rain down and cause havoc, but I believe that most of the radioactivity from detonation would remain in space near point of explosion. some would coat outer surface of rubble but be 'blown off' by heat of reentry and so not make it to earth.

that said, we'd still kiss our asses goodbye with the enviromental effects. Check out Discover magazine for more info on the blasts and damage caused by 65 and 125 million years ago 'encounters' with Big asteroids!

I still marvel at the wasted landscape - all the trees laid out like matchsticks - in the Tunguska blast in Russia near the beginning of the 1900s. That was a SMALL one that exploded in mid air - it did NOT plow into the earth to throw up all sorts of shit and leave a crater.