Crocodiles once ruled the Amazon

February 25, 2015 4:28 PM

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Some 13 million years ago, northeastern Peru hosted seven species of crocodiles, a diverse co-existing assemblage not seen before or since. The arrival of the Amazon, flowing toward the Atlantic, flooded the habitat and diminished mollusk populations -- the main food source for several of the thriving croc species.

"We uncovered this special moment in time when the ancient mega-wetland ecosystem reached its peak in size and complexity, just before its demise and the start of the modern Amazon River system," the lead study author Rodolfo Salas-Gismondi, a researcher at the University of Montpellier, in France, ...

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