The site is called Külhöyük, in the Oyaca neighborhood of Ankara’s Gölbaşı district, about 20 kilometers (12 miles) south of the capital. It’s a tell — the term Near Eastern archaeology uses for an artificial mound built up by layer upon layer of human occupation — roughly 250 by 150 meters (820 by 490 feet) […]

Egyptian blue predates the pyramids’ final form. Egyptian artisans were producing it before 3100 BCE, making it, as far as archaeologists know, the first pigment humans ever manufactured synthetically. It’s a compound called cuprorivaite (calcium copper silicate), made by firing silica, lime, copper compounds, and alkaline salts at high temperature until they crystallize into a […]