It's one of the most toxic substances known to science. You would die from inhaling 13/1,000,000,000 of a gram of it. And some folks inject small amounts of it in their faces to get rid of their wrinkles. (Go figure.) Botulinum toxins are fascinating, all-natural chemicals—they're made by bacteria—and just last week, a team of scientists discovered a new type of the toxin, as well as a new strain of the bacterium that makes it, Clostridium botulinum.