This week we're looking at some of the animals, insects, and creatures we fear the most and the venom that makes them so powerful. Biologist and science blogger Christie Wilcox returns to talk about her first book "Venomous: How Earth's Deadliest Creatures Mastered Biochemistry". And Jim Olson, a physician scientist and Director of Project Violet, tells us about "Tumor Paint", a fluorescent molecule that binds to solid tumors to help guide surgeons during surgeries, which was partially derived from the venom of the deathstalker scorpion.