Which countries have brought back soil from the Moon, what things can be known from it?

Which countries have brought back soil from the Moon, what things can be known from it?

The Moon is located at a distance of about 3,84,400 kilometers from our Earth. This moon has become a laboratory of science, where many countries are launching or preparing to launch their missions. But America, Russia, China and India are the only countries which have made soft landing on the moon. Now India has another mission, whose name is Spadex. This mission is to connect two spacecraft traveling in space, this is called docking.  If this mission is successful, India will become the fourth country to do so after Russia,…

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