Researchers at Carnegie Mellon University are stud... ...y of the Masa River in Kenya. Approximately 4,000 hippopotamuses live in that river. On average, a hippo produces...http://www.neatorama.com/2014/05/23/Scientists-Build-Crocodile-Shaped-Boats-to-Study-Hippopotamus-Poop/
Scientists Build Crocodile-Shaped Boats to Study Hippopotamus Poop...
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