Eric Walker added Ordovician–Silurian extinction events - Wikipedia to Ordovician-Silurian extinction events and Late Ordovician mass extinction (LOME)

Eric Walker added a number of topics and a number of links to Extinction events, and added Extinction events to Paleontology

Eric Walker added Ordovician-Silurian extinction events and Silurian - Wikipedia to Silurian period, and added Silurian period to Paleozoic era

Eric Walker added Culprit for Mass Extinction 445 Million Years Ago? Global Warming - The New York Times and Ordovician–Silurian extinction events - Wikipedia to Late Ordovician mass extinction (LOME), and added Late Ordovician mass extinction (LOME) to Ordovician-Silurian extinction events

Eric Walker added Late Ordovician mass extinction (LOME) and Ordovician–Silurian extinction events - Wikipedia to Ordovician-Silurian extinction events, and added Ordovician-Silurian extinction events to Ordovician period, Silurian period and Extinction events

Eric Walker added Ordovician-Silurian extinction events and a number of links to Ordovician period, and added Ordovician period to Paleozoic era