George C. Page Museum Of La Brea Discoveries: The Official La Brea Tar Pits Page

Saber-Toothed Cats: From The University California Museum Of Paleontology

Sightings: Cloning Of Frozen Mammoths Remains Elusive, By Beverly Jaegers

Of Mastodons, Mammoths and Other Giants of the Pleistocene: The UnMuseum

Mammoth Site Museum: Mammoth Site Of Hot Springs, South Dakota

Midwestern US 16,000 years ago: A page from the Illinois State Museum

The Pleistocene: A page from the University California Museum Of Paleontology

Pleistocene Events And Environements: A page from Britannica.com

Prehistoric Cultures, Pleistocene: Dr. Tim Roufs, University of Minnesota Duluth

Paleo-Forecast: Ice Age Under High Pressure By Terry Canup

Global Land Environments During The Last 130,000 Years