Quote:Depends. Which would stay in the atmosphere longer for "nuclear winter" effect -- water vapor or dust? I'm not really sure. Also, a land impact might well touch off forest fires by superheating the atmosphere, putting lots of smoke and soot in the air that you wouldn't get with a sea impact -- at least, not unless the latter hit the crust hard enough and in the right places to trigger lots of volcanic eruptions.
A center-continent hit would have had less extreme global effects, leaving life on other landmasses not so badly affected.
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Big Brother is watching you. And damn, you are so bloody BORING.