Snake Facts: Snake venom evolved from saliva, which means that it all started with a snake whose mouth was sliiightly more gross than usual. [[A snake slithers into frame.]] Snake: Hi guys! Out-of-panel: Eww, it's Frank. The world's longest snake is found in Brazil, Peru, and Chile. It is believed to be over 60 years old. [[A range map showing South America with a silhouette of a giant snake marking the range.]] [[A snake skeleton.]] If you lad all the bones in a snake end-to-end, you would have a snake. {{Title text: Biologically speaking, what we call a 'snake' is actually a human digestive tract which has escaped from its host.}}