什么是 Middle Paleolithic？

A revolutionary breakthrough in stone tool making occurred 300-400,000 years ago in the Caucasus and East Africa, associated with widespread fire use and long-distance material transport, deemed equally significant as later human behavior revolutions.

The revolutionary breakthrough in stone toolmaking first appeared 300,000-400,000 years ago in the Caucasus and East Africa, an event possibly underappreciated in its significance.