A team of paleontologists led by Professor Neil Shubin from the University of Chicago published in the journal “Proceedings of the National Academy of Sciences” the results of a research on Tiktaalik roseae. It’s a species that lived during the Devonian period, about 375 million years ago, which is a transitional form between fish and legged animals. This research highlights the adaptation of the hind fins of this animal, showing that it had already started in fish.