Summary: Until recently, there's been little understanding of the evolutionary history of tropical frogs, but a discovery out of Penn State offers some light to this "black hole." The research team found that nearly all of the 162 Caribbean frog species originated from a single species that rafted on a sea voyage from South America 30 to 50 million years ago. Surprising news... never before had a single origin been identified and it's rare that close relatives dominate such a major geographic region. These researchers are really shaking some limbs in the strife to understand the "tree of life."
