“ The water is most-unusual substance on Earth”

The human is an Earth creature, who thinks himself  as the master of this planet.
However his dreams  are directed up to the sky.
If we get out of our dreaminеss about heavens, suddenly we will realize that we stay on a piece of rock among the world’s oceans, that occupy 70 percent of the Earth surface. And in this water world there are the highest, the deepest and the longest earthly formations, endless caves and lost civilizations.
That is one world still unsolved, unexplored and filled with mystery!