Some fortunate visitors to the Chicago Botanic Garden recently witnessed the rare opening of not one, but two, titan arums. Better known as corpse flowers due to their pungent odor that resembles decaying flesh, the massive plants bloom once every ten years, and that too, for only a few hours. However, that may be a good thing given that when the petals unfurl, the stench emanated is so foul that it has earned the titan arum the title of the “world's smelliest flower.”