A mouse bit a venomous viper to death after it was thrown into the snake's cage as a lunchtime snack. The tiny rodent killed the snake after a fierce 30-minute battle, emerging with "barely a scratch on him", ... Firefighters ... thought that the live mouse would make a perfect lunchtime treat. But the furry creature had other ideas. Instead of cowering from the 12in snake's gaping jaws and long fangs, it went on the offensive. Vipers are one of the most widespread species of snake in the world, and their adder sub-species is the only poisonous reptile found in...