In the beginning

 According to the great and esteemed trove of ancient knowledge that has been dug up by diggers of such things, the earth was totally enshrined in water sometime in its primordial past. Sifting through my colander like memory the consensus seems to suggest that there must have been an awful lot of it - say maybe a couple of miles (numerous kilometers) deep. That's a lot of water. Where did it all go?

Supposedly no where - it simply sat there looking wet until the muck underneath it began rising up like some flailing behemoth getting fed up with being wet all the time. The water then rushed away from this behemoth leaving it high and dry.

The behemoth, realizing that being high and dry was OK, decided to rise up even more until at some point one large body of high and dry muck was sitting proudly in the middle of all this water. Today the diggers of such knowledge generally refer to this blob as Pangaea and assume all is well and good in the land of ancient knowledge. But, once again, where did all the water go that had been keeping this lump of ancient clay under it's thumb for so long?

I believe that it's a well known fact that water, under appropriate circumstances, appears to disappear - aka evaporates. At which time it cease to exist - as liquid water. It magically turns into invisible water - water vapor.

So isn't it possible that some of this primordial cloak of water might evaporate too? But doesn't water have to be hot to evaporate? Like at it's "boiling point"? (It may have been in the days before it wasn't; which wold only help the evaporation process. If it actually happened at all.)

If it could evaporate where would it evaporate to.  Take a beaker and fill it with water - put it under a vacuum jar - crank up the vacuum. What happens? The water starts to boil and evaporate. And fill up the vacuum jar with invisible vapor.

Now imagine - where is earth? - floating around in an infinite vacuum. And where is the water (and the water vapor) in this relationship? Directly in contact with the edge of space - the vacuum. There is lots of room in space for evaporating water.