you learned from geochemist Rhy McMillan and archaeologist Jerram Ritchie that we “source” the raw material of tools (aka “toolstones”) using a technique call X-Ray Fluorescence (XRF) which determines ...

Archaeologists working in China found something they weren’t supposed to: stone tools that look exactly like those made by Neanderthals in Ice Age Europe. Buried in red clay at the Longtan site in ...