Hippos might seem harmless from a distance, but their poop plays a surprisingly dangerous role in river ecosystems. Here's how this natural waste can choke out fish, alter water quality, and even ...

This video investigates why hippo waste poses an unusually deadly threat to river ecosystems. Scientists reveal how the sheer ...

John R. Hutchinson does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...