What is the reason why Vernadsky called the modern biosphere the noosphere?

The appearance in the biosphere of the genus Homo (man) is the beginning of a new era in the history of the planet – the noosphere.

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.