The uplift of the Isthmus of Panama 2.6 million years ago formed a land-bridge that has long thought to be the crucial step in the interchange of animals between the Americas. However, scientists now describe fossil crocodilians that shed a surprising new light on the history of interchange and animal distributions between the Americas.
via ScienceDaily: Anthropology News http://www.sciencedaily.com/releases/2013/03/130304151756.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily%2Ffossils_ruins%2Fanthropology+%28ScienceDaily%3A+Fossils+%26+Ruins+News+--+Anthropology%29
via ScienceDaily: Anthropology News http://www.sciencedaily.com/releases/2013/03/130304151756.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily%2Ffossils_ruins%2Fanthropology+%28ScienceDaily%3A+Fossils+%26+Ruins+News+--+Anthropology%29
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