In Tunis, the desert night formed a unique freshwater lake to a depth of 18 meters.
The exact explanation of the phenomenon, scientists are not yet able to give, presumably, the reason was the seismic activity in the region.
Some planetary scientists commented that sometimes due to the collision of the inner layers of soil water comes to the surface after a particularly strong aftershocks.
Due to the high density of soil, according to this version, the back water is not able to enter and remain on the surface layer of a thickness of 18 m.
On the waterfront locals had staged a kind of beach, but scientists warn that the water may be dissolved toxic substances. Now experts are waiting for the results of sample analysis to determine whether the water is safe for humans.