Why do many food plants contain cyanide? In murder mysteries, the detective usually diagnoses cyanide poisoning by the scent of bitter almonds wafting from the corpse. The detective knows what many of us might find surprising — that the deadly poison cyanide is naturally present in bitter almonds and many other plants used as food, including apples, peaches, apricots, lima beans, barley, sorghum, flaxseed and bamboo shoots.There's a reason that cyanide exists in all these plants, and it is — to paraphrase Sherlock Holmes — evolutionary, suggests Kenneth M. Olsen, PhD, an assistant professor of biology in Arts &...