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Archaeologists are using drones found in Ireland traces of a previously unknown, hanja prehistoric structures similar to Stonehenge. The discovery was made possible thanks to the strong heat, which affected the growth of grass over the ruins. This publication reports Science Alert.
The remnants of hanja are round mark with a diameter of 150 meters. The estimated age of the finds is about five thousand years, and the building was built during the late Neolithic or early bronze age.
The henge is part of the archaeological complex of BRU-na-Boyne valley Boyne (40 kilometers North of Dublin), which includes burial mounds, menhirs and other Hindi. Building, according to the researchers, was intended for ritual and could accommodate several thousand people.
According to archaeologists, the discovery is of international importance because it has not previously encountered features. These include, for example, sections of double grooves that make up the circle.
There are several mechanisms of formation of markings indicating the location of the ruins. First, plants from the heat can completely dry out, if they grow directly over stone walls or the Foundation that prevent the accumulation of sufficient moisture in the soil. In another case, water may accumulate in the artificial ditches filled with soil, and then grass over them, on the contrary, grows better than in other places. The differences become apparent when relatively long periods of drought, so in normal conditions the ruins remain hidden for many years or decades.
Video, photo All from Russia.