The Discovery of Botox

How an ophthalmologist and a dermatologist in Vancouver, Canada, discovered that small amounts of a deadly toxin could make frown lines disappear. Chloe Hadjimatheou spoke to Drs Jean and Alastair Carruthers about their breakthrough. Photo: Doctor injecting a woman's face with botulinum toxin. Copyright: Pascal Goetgheluck/Science Photo Library.