A study has found that river water contains surprisingly high levels of protein. Researchers collected samples from various bodies of water and discovered that the protein content in river water is higher than previously thought. This discovery challenges the common belief that river water is primarily made up of minerals and other inorganic compounds. The presence of protein in river water could have significant implications for both the environment and human health. It is unclear how the protein is entering the water sources, but further research is needed to understand the sources and potential impacts of this protein. The findings from this study highlight the importance of monitoring and analyzing the composition of water sources for potential contaminants, including unexpected substances like protein.