David Ian Howe on Instagram: "If it walks like a duck and quacks like a duck, humans are probably going to throw the stone tipped projectile into said duck. While it was probably a combo of changing climate, disease, and humans…. Denying humans had any role is ignoring basic scientific pattern recognition. #IceAge #pleistocene #pleistoceneextinction #megafauna #Extinctions #Archaeology #Anthropology #StoneTools #PeoplingOfTheAmericas #archaeologymemes"