In some areas of southern China, intermittent rain will last for a month. Of course, if it rains heavily, it will also trigger a series of natural disasters, causing many casualties and property losses. In addition, the ancient war paid attention to the harmony of time, place and people, and the influence of rain on the war was also very important. For example, the rainstorm in Hulu Valley saved the lives of Sima Yi and his son, Nurhachi won with the rain, Napoleon lost with the rainstorm, and Sanyuanli cheered for fighting against the rainstorm in Britain.

So when is the biggest and longest rain since ancient times? I believe many people don't know, but scientists have come up with the answer after careful research and analysis. During the evolution of the earth, there was a rainstorm that lasted for 2 million years. You are not mistaken, it is 2 million years. This time can be said to be very terrible, which is equivalent to the beginning of human birth and can continue to the present.

The rain happened after the second extinction of the earth. The second extinction of the earth, marine life suffered heavy losses, and 78% of marine species became extinct. Even the most powerful dungeon didn't realize the disaster was coming. This extinction was also the longest among the five mass extinctions, lasting about 2 million years or more. However, there was a major breakthrough in the evolution of the second extinction, and the earliest terrestrial vertebrate hyenas landed on land. If there were no sea salamanders, there would be no human beings today.

The second extinction caused the earth to turn into a fireball in later time, and most of the volcanoes erupted, causing a lot of seawater to evaporate. With the passage of time, the earth's movement gradually stabilized and the temperature gradually decreased. Finally, the water vapor slowly condenses and finally rushes to the ground, forming rain, which lasted for 2 million years. It is precisely because of the nourishment of rain on the earth that animals and plants have a suitable living environment and slowly ushered in the dinosaur era.

At the end of Cretaceous 66 million years ago, an asteroid with a diameter of tens of kilometers hit the earth, which led to the extinction of dinosaurs. Since then, the earth has entered the era of mammals, and human beings have been born slowly, stepping onto the historical stage and becoming the masters of the earth. Maybe without this rain that lasted for 200 years, there would be no human beings.