Animals can walk when they are born. Why can't human babies?

Animals can walk when they are born. Why can't human babies?

The continuation of life is inseparable from reproduction. Both humans and animals have made great efforts to take care of their offspring. Even though we sometimes feel that animals don't seem to have much emotion, there is no denying that they are very concerned about their offspring. However, have you ever found such a thing, that is, the cubs of animals seem to be much more powerful than babies.

When human babies are born, their eyes are closed and they can do nothing but cry, but animal cubs are completely different. The cubs of horses, cows and giraffes can stand within one hour after birth, and can avoid predators on 1 day after birth; Monkey cubs can hold the hair of the mother monkey tightly and hang it under the belly of the mother monkey to solve the problems of food and clothing and safety in one stop; Young fish, turtles and whales can swim after birth; Chickens and ducks can run all over the ground after hatching.

So why can't human babies be born and run like animal cubs? This is because animal cubs are born after they are fully developed in the mother's stomach, while human babies are not fully developed at birth, which is equivalent to a "semi-embryonic" state, which is called "premature baby". Therefore, it is impossible for a human baby to be alive and kicking at birth like an animal cub.

So, how long does it take for a human baby to be pregnant before he can walk at birth like an animal? Zoologists have calculated that babies need to be pregnant 18-2 1 month at birth to reach the maturity of chimpanzee cubs, while the average pregnancy of humans is only 9 months, that is, babies from 9 months to one year old after birth are similar to newborn gorillas. In that case, why don't humans get pregnant for a long time and let the baby mature and regenerate?

Most animals walk on all fours, while people walk upright. Walking upright not only brings us convenience, but also produces disadvantages. For example, humans often have to endure back pain and lumbago. In addition, walking upright will narrow the buttocks of women and narrow the birth canal. The human fetal skull is relatively large, and it is almost impossible to wait until it is fully developed and regenerated. Therefore, in order to better reproduce, "natural selection" makes human beings need "premature delivery".

Although humans can't rely on the time of pregnancy to make babies mature, they can rely on nurturing to maintain the development of babies. Although the early babies are not mature enough and always sleepy every day, they have enough safe environment to grow up slowly. But animals are different. Nature's law of the jungle will not give animal cubs time to develop slowly, so they must learn and grow quickly, otherwise there is only one ending waiting for them, and that is death.