Ancient reptiles gave rise to birds and mammals, in which there was a complication in the structure of the nervous system and sensory organs, a four-chambered heart, a more perfect respiratory system, a constant body temperature, increased metabolic rate, etc. These progressive changes determined a high level of organization and contributed to a wide resettlement of birds and mammals on Earth.
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.