Most historians will tell you the earliest evidence of biological and chemical weapons dates back to World War I and the use of mustard gas. But one historian has amassed a significant amount of earlier accounts that prove otherwise. Adrienne Mayor unearths histories of toxic honey, red-hot sand and stench weapons used throughout antiquity. She talks about these and other modes of ancient biowarfare in her new book, “Greek Fire, Poison Arrows and Scorpion Bombs: Biological and Chemical Warfare in the Ancient World.”