Element Water Live Wallpaper

Many people think that water - it is one of the most simple, well-studied substances. But scientists still "Al two about" one of the unsolved mysteries of science. Most think most compressed matter during freezing and the water somewhat expanded. Why? Another mystery is why the solid form of water (ice) is less dense than liquid?

Water - is the most important substance for the human body as a person live without food for about a month without water and watch it deemed just a few days. In the absence of water plants wither and dry up. Animals deprived of water, die quickly.