The most potent treatment for severe pain - as potent as morphine - has been developed by scientists.
A sea snail's saliva contains chemicals that help the slow-moving creatures catch prey.
These chemicals are injected into passing prey with hypodermic-needle-like teeth that shoot from their mouths like harpoons.
The upside is that there's no risk of addiction, according to the experts.
Australian scientists, meanwhile, have developed an oral form of the painkiller that can work in low doses.