Earlier, when people did not have scientific knowledge of the world around, everything was explained by the gods. They shed rains, moved the earth, killed and treated people. Now most of what is happening is understandable, at least in part, but there remains something that even leading scientists can not explain.
1. "Unidentified" jelly
In various plants (shrubs, grass and even ordinary trees) periodically find something reminiscent of the consistency of ordinary jelly. And it happens since the 14th century - then jelly did not exist and people described it as a transparent and sticky material, which has a slightly grayish color. Its peculiarity is that some time after the appearance (in an unknown way) it evaporates. Versions are different, but the proven origin of the substance is unknown.
2. Ball lightning.
Everything was heard about her. This is, in fact, a natural electrical discharge, in the form of a ball. Many even saw something similar in their lives. However, this phenomenon is not proved, scientists all write off to hallucinations or "delirium", since it was never possible to detect such a phenomenon for research (at least some).
3. Musical dunes
The main question is why? In areas where there is a lot of sand (the same desert), with the wind the particles of sand begin to literally "sing". All this happens exclusively in a natural way. The sounds that arise can be confused with anything. He looks like a laugh, cry, howling at different moments of the "song". Why and how exactly sand makes such a sound is incomprehensible to anyone.
4. Fireballs in the valley of Hessdalen.
Unlike the same ball lightning, the valley of Hessdalen was investigated by scientists. It was possible to detect a little less than a dozen energy bunches. It looks like a fireball, they come in different sizes, move at different speeds and change color. The latest research was conducted in the year 83, but the results did not bring. Now this place attracts all lovers of the unknown.
5. Wonderful Forest
This place is located in Poland. A small grove, numbering several hundred pines, was planted more than 80 years ago. All the trees in it have bizarre shapes. Some say that this is the result of some uncharted natural phenomenon, while others blame the human footprint (which is quite possible). But here's why someone "bend" specifically the forest, spending dozens of hours of life each month, is unclear.
6. The Devil Maker in Minnesota
In Minnesota there is the Brühl River. Nothing noteworthy, in one place is divided into two streams. One forms a waterfall, falling into the lake. Elsewhere, water flows down into the ravine called the Devil's Teapot. The name is telling - since all the research aimed at finding out where the water goes next, did not yield results. It seems that she really goes to tea Satan.
7. "Quiet" lightning
Usually in a thunderstorm we see a flash (or a series of bright flashes), and after 3-4 seconds we hear a sound of thunder. It is due to the fact that light overcomes the distance much faster than sound. In Catatumbo (the river of Venezuela) in the same place you can often see lightning, but no sound from this natural phenomenon is not the case.