The greatest mass extinction in Earth history eliminated 85 percent to 90 percent of all marine and land vertebrate species 250 million years ago, at the end of the Permian Period and the beginning of the Triassic. New evidence from researchers at the ºÚÁϳԹÏÍø and the South African Museum shows the extinction was accompanied by a massive loss of vegetation, causing major changes in river systems.
September 7, 2000