Modern Marvels: Since ancient times, man has tried to control the "devil's bounty"--deadly substances found throughout nature. Paradoxically, some of these lethal compounds are now found to possess life-giving properties. In this hour, we explore how ancient Egyptians, Greeks, and Romans came to rely on the pernicious power of poisons and learn the physiological action of these potent killers. During the Renaissance, known as the Golden Age of Poison, the deadly practice helped shape European history--most especially that of the Catholic Church. We continue our investigation into the gas attacks of WWI and up to the 21st century, when a new and serious threat of bioterrorism plagues the globe. Finally, we peer into the future with scientists experimenting with poisons and venoms from the plant and animal kingdoms that may play an important part in healing diseases such as arthritis and even cancer.