#3. Deborah Blum
We wonder if Deborah Blum ever has trouble boarding an airplane or belongs on some FBI watch list. This "Queen of Poison" is Wired's resident expert on toxic substances. Cyanide? Yep. Ricin? Got it covered. Toxic eye drops? Of course. Planning on poisoning your spouse? Blum gives you tips on how not to do it. In chemistry class, while the rest of us were calculating molecular weights, Blum obviously was preoccupied with greater questions: "How much methanol would kill an 80-kg human?" The coolest chemistry lessons are always about blowing stuff up or poisoning people. Blum has the latter expertly covered.