Why do snails leave their shells?

How are snail shells made?

Some consider snails to be a salad robber, others a delicacy. But there is one thing they all agree on. Snails are slow. And that's a good thing: Because the most fascinating things often emerge slowly. The Natural History Museum in Vienna shows how snail shells were created. Different families of snails have emerged from one type of snail, originally with a flat shell snail - all of them with artfully turned shells. Most snail shells look like they're spinning clockwise around themselves - always to the right. There is one exception, however. The shell of the door snail. It turns continuously to the left - a left-hander, so to speak. In addition, there are of course exceptions that have arisen due to random external influences. Their housings are also twisted to the left. There is a name for this rarity among Roman snails: Snail King. The shell of a snail king is very popular among collectors. There is only one left-hander out of 10 million right-handers. But why did the case develop right and left? “There is actually no biological reason why the snails are right or left coiling. The fact is that more than 90 percent of the snails worldwide are right coiling and the left coiling form the small minority, the exception On the other hand, in very rare cases due to the genome of the mother animals. Snail shells were created to protect the internal organs of snails. You are lying in a viscera. At birth, the viscera rotates around its longitudinal axis. As a result, the shell of a snail coils in a spiral. The small snails are equipped with an almost transparent shell. The older you get, the thicker your house becomes. Glands, which are distributed over the body, strengthen the shell from the inside with lime. Two layers of lime form in the snail shell, one horizontal and the other vertical. They stabilize the snail shell and make it largely unbreakable. The shell grows until the animals reach sexual maturity, thus creating space for the growing body. But always nice and slow. At a snail's pace.