How can we turn snail shells into houses and snails?

First of all, tell you the answer: snails don't shell! Snails have a short life span, the longest is only six years. In these six years, if you live in a cold area, except hibernation, you have to sleep almost half the year, and the waking time is only three years at most. In these three years, it has too many things to do, and it is very dark.

Slug is a kind of "snail" without shell. The name may sound awkward, but you must know its common name: "slug". Like a snail, hermaphrodite, hermaphrodite. The only difference is that one has real estate and the other is Beipiao.

Snail shells all grow in a spiral, and the spiral increases layer by layer. You will find that due to hibernation and other reasons, a dense vertical "growth line" will be formed on the shell, which is somewhat similar to the annual rings of trees. Snail shells will grow with snails until they are fully mature, and the shells will stop growing, just like human bones.

Shells play a vital role in snails. Just compare with slugs. There is a folk saying that slugs turn into water when they meet salt. Although this statement is not very accurate, the difference between a house and a house is still huge. So every slug has a heart to be a snail in the next life.

Speaking of shells here, I might as well tell you a very interesting point. Most animals with shells in the world are right-handed snails, and a few are left-handed snails. If you meet them, you will be really lucky!

In fact, this is the same problem for all exoskeleton animals ... snails have at least one opening, and animals with closed bodies such as insects are completely helpless. The only way is to change your hair regularly.

In contrast, an endoskeleton like humans is much easier because our periosteum and other structures are attached to the outside of the skeleton. If you stand outside a house, you can make it as big as you want.