Rain is very important in any country. The population of every country depends on rain for drinking water, so do you know when it rained for the first time in the world and what fell on the earth instead of water drops at that time? Today in this story we will know about this 420 crore year old history of the earth. When did it rain for the first time on earth? Most of the theories of solar scientists state that 4.6 billion years ago our solar system was surrounded…
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