One of humankind's strangest tacit agreements is that grown-up people call themselves "adults". They are not adults, and they know it for themselves. They are overage teenagers in adult bodies. That is why people tend to speak of constant development and growth.…
The psyche doesn't remain visible in fossils, but it does appear indirectly in stone tools. However, in human evolution, making stone tools is not a feature of species; it's a trait of only a few genetically divergent and unadaptable individuals. That explains…