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People have always wanted to swim like fish and navigate the endless water current. Years of complex research, endless development, thousands of exhausting and dangerous tests, a lot of money and - submarines were created. Hundreds of meters long, weighing tens of thousands of tons, thousands of tons of displacement, advanced technology inside and out. All this is quite clear, but what else might we not know about submarines? For example, the fact that humanity, in its desire to quickly overcome any obstacle, tried to create an analogue of submarines that can move underground. #pandora_tv