> Here's something I've always found curious. The continents look like,
> for the most part, they all sort of fit together. So maybe they were
> all fitted together at one point, in a much smaller sphere without all
> that water? And then either the water came in the form of a meteorite,
> or, more crazily, formed an outer shell (though how it would sustain
> itself I don't know) and came crashing down.
> Idle ramblings of a friday afternoon...

http://en.wikipedia.org/wiki/Earth

The planet has always been this size and water has been there (here)
since it was cool enough for vapour to condense. The continents are
just pool furniture, sort of, floating around on magma

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