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The matter which created our planet.

When an astronomer aims his telescope at one of neighboring with the Earth planet, he is always exited to know if there is water and oxygen there.
This question is not casual. If we detect them in an adequate volume on some planet, we could expect that there is life at the planet somehow resembling ours.
This was water that created Earth, made it as it is now, and originated life. Moreover, water is the most amazing matter on Earth, the more we get know about it, the more we are amazed.
Probably few of you ever pondered over the wonderful properties of water and this is understood, because water is all around us, it is very common on our planet.
Water occupies 3/4 of the Earth’s surface. About 1/5 of the land is covered with solid water (ice and snow), a good half of it is obscured by clouds which consist of water vapors and tiny water drops. Even there where there is no clouds water vapors are always in the air.
It is very common on our planet, even the human’s body consists by 70% of water. But the ordinary things never seem to be amazing. However this ordinariness itself is uncommon. None of the matters on Earth is found in such volumes and at the three states at a time: solid, liquid and gaseous.