Why is the giraffe's neck so long?

Because of the change of natural environment, giraffes have less food. In order to survive, giraffes can only raise their heads and keep stretching their necks, trying to eat the leaves on the tall trees. Their advantages are continued through inheritance and variation from generation to generation until they become tall in today's animal kingdom.

Of course, in addition to this genetic explanation, some scholars have put forward the theory of "using in and discarding out". They point out that giraffes should always try to stretch their necks because they often eat leaves from trees with their necks. With the frequently used organs becoming more and more developed, the unused organs degenerated, so after many generations, the giraffe's neck gradually became longer and finally became what it is today.

brief introduction

Now giraffe, the tallest animal in the world, is a representative wild animal in Africa. China has never produced giraffes since ancient times. In the 12th year of Yongle in Ming Dynasty (A.D. 14 14), on September 20th, Min Yang of Zheng He brought back a giraffe as a tribute to Saifuddin, the new king of Bangra (now Bengal), and the Ming Dynasty was in an uproar.

Because the giraffe's appearance and habits are too consistent with the Kirin described in China's ancient books, after further understanding, it is found that the giraffe originated in East Africa, and the local Somali language calls it "Jiri", which is very similar to the pronunciation of Kirin, making China people more convinced that the giraffe is Kirin.