If we say that it is possible to meet water everywhere at ocean it will be trivial true but if we say that water can be found everywhere on land, it will be a paradox. But still water really can be found everywhere on land, even in desert if we dig out deep well. In the past it, probably, also supported hypotheses about emptiness in the Earth filled with water, which feeds the rivers, or even about a continuous underground water layer. The greatest interest for water supply represents gravitational water in the Earth.
Man knows very little about underground waters, especially is deep layers. The man still cannot find out all the details. The chink on the Kola peninsula in USSR, deepest in the world, has reached 12 kms. Therefore the estimations of weight of these waters strongly differ. Usually when calculating the weight people take into account only stocks of water in top 2-3, rarely 5-kilometer layer. The drilling of deep chinks, including the Kola peninsula, has shown, that water in the deep layers of the Earth can exist in a liquid condition much below than 5 kms from a surface, and depending on conditions, deeper than 10 kms.
Temperature inside the Earth grows with the depth, more and more vapour is formed there. On significant depth at high temperature all water turns into watervapour mixture. And at temperature 3740C for stale water and 4250C and higher for the sated solutions, water turns into the special condition, when the difference between the vapour and water is erased, as the molecules of water get the speed of gas, and its density is close to the density of liquid water. Some kind of water plasma appears.
Pliniy wrote that " water impregnates all Earth - from within, outside, from above". Pliniy's words are right.
