What can old stone tools, ancient fire pits ... How did we become so dominant, so pervasive, so quickly? The material record — the archaeological record — largely consists of bits and pieces ...

The human Stone Age was ... a 1.6-to-0.7-million-year-old archeological site in the Ethiopian Highlands, researchers were ...

An ingot typically refers to a solid piece of material cast into a shape suitable for further processing, usually made of relatively pure substance. Small fragments or powdered forms are the ...