Éric Boëda, a professor at the Paris Nanterre University, is among the pioneers of the French technological approach to stone tool analysis and the most active Paleolithic archaeologists working today. His fieldwork includes projects in Brazil, Mali, Syria, France, and China. His research challenges some of the most established ideas about prehistory, including the timing of the first arrival of humans in the Americas, the evolutionary context of Homo erectus, and the hunting capabilities of Neanderthals. Professor Boëda's reputation is built equally on his influential work on the theory of technological evolution and the methodology of stone tool analysis.

Michael Chazan is a professor at the University of Toronto. He co-directs the Wonderwerk Cave Research Project, with fieldwork at Wonderwerk Cave and the sites of the Kathu Complex, both located in the Northern Cape Province of South Africa. He is the author of The Reality of Artifacts: An Archaeological Perspective (Routledge, 2019).