Other
Illinois State Museum: The Midwestern United States 16,000 Years Ago
What did Northern America look like 16,000 years ago? Were the plants the same? What happened to the mastodons and the saber-toothed cats? Here's a short website that is easy-to-understand and supplies at least some of the answers.
San Diego Natural History Museum
San Diego Natural History Musem: Fossil Field Guide: Giant Ground Sloth
A look at what fossil evidence tells us about the life and ecology of prehistoric giant ground sloths.
Other
Yukon Beringia Interpretive Centre: Research: Jefferson's Ground Sloth
Uncover discoveries from the past by learning about the prehistoric Jefferson's ground sloth. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.
Curated OER
Bbc Nature: Prehistoric Life: Giant Ground Sloths
Illustration of the prehistoric mammal, the giant ground sloth.