Nature's poisons possess awesome powers. National Geographic's POISON! re-lives the spine-chilling experiences of people who have survived near-death encounters with some of nature's deadliest toxins - and discovers how modern medical technology is turning the tables to use poisons in the fight against disease. Using sophisticated animation and photography, POISON! reveals the secrets of attack and explores the human body during crisis, including nervous system dysfunction, anaphylactic shock, severe swelling, and tissue destruction. Poisons are among nature's most ancient weapons. And yet, more and more, they hold keys to our survival.