A fetus does not immediately become like a little man. There is an opinion that at first it resembles a fish, then a lizard, finally a man. German scientists Haeckel and Müller even formulated the law: in individual development, the body repeats the history of the development of its species. This is not so. Indeed, at a certain stage, the human fetus has gill arches, the same as those of fish larvae, there is a period when the fetus, like a reptile, has a tail, which subsequently disappears. But it is difficult to name a stage of the embryo or fetus at which it would look like a fish or a reptile, because the development of organs proceeds at different rates
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.