The Soviets tried to drill through the earth, and drilled to 16,262 meters why they stopped drilling down?
Nowadays, human beings are exploring more and more deeply into the unknown, our human Voyager vehicle is about to fly out of the solar system, which is already very far away from the Earth, and the Moon has been logged many times, and several planets near the Earth have been approached by man-made probes, human beings have made great achievements in exploring space, but human beings do not know the Earth very well, for example, what will be under the earth that we step on? Now the internal structure of the Earth is only a speculation, and no man-made probes have gone in, so many things can not be easily concluded.