McClatchy: New research led by two University of California at Berkeley biologists finds frogs and other amphibians worldwide need help, because they are dying at alarming rates. The researchers find that some frog populations are at 2 to 5% of their former size – that’s a decline of 95 to 98% – which they argue is a warning sign of a larger global issue. An article published this week in the journal Proceedings of the National Academy of Sciences reports that scientists are not yet sure …