Stalagmite at a nuclear power plant (Ukraine). Accidentally found stalagmite in one of the blocks of the nuclear power plant, where the most major nuclear disaster in the world. As a result of human error and flaws in the design reactor RBMK-1000 in 1986 there was an explosion of the reactor, which resulted in 200 thousand square kilometers of land are infected. The total number of victims of the accident was 4 million people. The radioactive cloud formed during the accident circled three times Earth, 2019