As a matter of fact, humans continuously delegate and distribute cognitive functions to the environment to lessen their limits. They build models, representations, and other various mediating structures that are thought to be good constructions. In doing this, humans are engaged in a process of cognitive niche construction. More precisely, we argue that a cognitive niche emerges from a network of continuous interplay between individuals and environment, in which people alter and modify the environment by mimetically externalizing fleeting thoughts, private ideas, etc., into external supports. This can turn out to be useful, especially for all those situations that require information transmission, shared knowledge, and more generally, cognitive resources.