Two articles, one published in the “Journal of Herpetology” and another in the journal “Palaeogeography, palaeoclimatology, Palaeoecology”, describe a research about the American alligator (Alligator mississippiensis). A team of researchers led by Dr. Evan Whiting of the University of Minnesota states that 8 million years ago they looked the same as today and even 30 million years ago they were not very different so they’re older than expected.