The discovery may one day help people with multidrug-resistant bacterial infections.
Scientists want to identify the hundreds of thousands of viruses that could potentially spill over from wildlife into humans.
Researchers took a detailed look at 17 years of training records for Norway's Marit Bjørgen.
Fish expend energy metabolizing drugs and personal products in fresh water.
The innovation could one day help marine biologists eavesdrop on whales and equip submarines with more sensitive sonar.