Poisons in the natural world kill thousands of people every year. They attack our bodies, leading to a "short-circuit". Yet some poisons are now being used to improve the way we look! The deadly poison curare was first used on the tips of arrows used by indigenous hunters in the Amazon rainforests, but its active ingredient is now used every day in hospitals across the world and even the chemical weapon Mustard Gas used in the horrors of trench warfare has now been adapted to be useful in chemotherapy treatments. Today the hunt is on for other poisons that can actually help to cure us; we extract the deadly venom of the Death Stalker scorpion, which may offer hope to people suffering from brain cancer.