When the chicken breaks its shell, it comes out at one end. Why does it kick the eggshell at the other end?

When the egg leaves the mother, the eggshell is rich in calcium. The eggshell has a three-layer structure, and the chicken grows up little by little in the eggshell. In this process, the eggshell becomes thinner from the inside out, and the calcium in the eggshell will also be absorbed by the chicken bones. Contains osteopontin, which affects the hardness of the inner and outer layers.

Another author of this study is Marc McKee, a professor at McGill University in Canada. He said that there are nanostructures in eggshells, which play a key role in the hardness of eggshells. Everyone thinks that eggshells are fragile, but in terms of thinness, eggshells are harder than some metals. Now we understand how eggshells are assembled and decomposed on the molecular scale.

This is also related to the genes and physical conditions of chickens. Some chickens are born at the right time, but there are not a few who suffocate because their shells are too hard to peck. All the chickens I raised in the countryside broke their shells at the same time. At most, chickens are weak, and special care will be fine for two days. I don't know if you are a farmer or keep it for fun. I don't know what to do with them on the farm. Maybe they have a more professional way.

It is pointed out that there are osteopontin in eggshells, teeth and bones. The researchers also observed the eggs fertilized and hatched for 15 days, and found that the nano-structure of the outermost layer of the eggshell did not change, but the size of the inner layer became smaller, which indicated that calcium carbonate was decomposed and dissolved in chicken bones in an acidic environment, and then the eggshell became weaker step by step, and finally the chicken broke out. This discovery can be applied to the future artificial special design.