Discovery ran an interesting program today in which it depicted, in gory detail, the effect of a large meteoric impact upon the Earth.
What shocked me was that, according to the program, such an impact would essentially boil off the oceans and turn the entire surface of the Earth into molten rock.
The size of the meteor in question was apparently the length of the country of Japan.
Let's start looking out for these planetkillers, shall we?
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