The tapeworms usually live in the intestines of dogs and cats, but they can also infect humans.
Hippocrates described unidentified parasitic worms in his medical texts 2,500 years ago. Ancient human poop just revealed which ones.
The amoeba was living in a rapids course at dangerously high levels.
Researchers say ivermectin, a drug designed to fight parasitic worms, could also help fight the spread of malaria.
The Nobel Assembly said the impact of the discoveries 'in terms of improved human health and reduced suffering are immeasurable.'