Water - the most simple and familiar substance on the planet. But at the same time, water conceals many mysteries. It still continues to investigate the scientists finding more interesting data on the water.

Fact one: the purest water in Finland
According to UNESCO, the pure water is in Finland. A total of fresh natural water 122 countries participated. While 1 billion people worldwide have no access to safe water.

Peace on 70% of the water we drink it, bathe in it, grow food with it, and just exist because of it. But some very dangerous waters. We present our list of lakes and rivers, which can cause a person serious harm or even kill.

Rio Tinto is one of rivers with the highest level of acidity, pH 2 at best, which is approximately equal to the level of acidity in the gastrointestinal tract of humans. This is enough to kill any fish that dares to swim in this river. In all likelihood the same faces and humans. Water is unsafe because of the special bacteria living in it. Such substances have been found on Mars, forcing scientists to think that perhaps the key to the mystery of the Red Planet is precisely in this river. It is just a pipe dream, but no doubt you will be wary of Rio Tinto as an angry grizzly bear, after all, and the river, and the animal are among those for whom a pleasure to watch, but it is better not to touch.