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Latest Vicariance Stories

Pseudophilautus poppiae
2014-08-05 03:30:16

Lauren Ingeno, George Washington University Assistant Professor of Biology Alex Pyron has created the only large-scale biogeographic analysis of its kind. There are more than 7,000 known species of amphibians that can be found in nearly every type of ecosystem on six continents. But there have been few attempts to understand exactly when and how frogs, toads, salamanders and caecilians have moved across the planet throughout time. Armed with DNA sequence data, Alex Pyron, an...

Story Of Ancient Invasive Species North America
2013-08-22 11:59:50

Brett Smith for redOrbit.com - Your Universe Online A new study from researchers at Ohio State University tells the story of an invasion and domination that took place around 450 million years ago in North America. During the Ordovician period, a dramatic ecological shift occurred near what are now the Appalachian Mountains, as represented in the fossil record. In the study, which was published recently in the journal PLOS ONE, Ohio State paleontologists provide evidence of significant...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.