geekosystem

Researchers from the Hungarian Natural History Museum and University of Alberta have discovered fossils that they believe represent the world's first real river monster -- a never-before-identified breed of mosasaur that thrived in fresh water rather than open ocean. The specimens represent the first evidence of mosasaurs -- initially land-dwelling reptiles that returned to the sea like modern dolphins and whales -- who left their ocean habitats in favor of freshwater homes like rivers, developing adaptations that would have let them thrive in the new environments where they were likely to top of the food chain.