NOTE: Includes 2 replacement disks. MEMBER REVIEW: This 2009-2010 History Channel series explores various topics in 13 episodes on 4 disks (except our copy has 6 disks as Disk 2 was replaced by 3 separate disks of one episode each.): Grand Canyon, Vesuvius, Birth of the Earth, Sahara, Yosemite, Rockies, Ring of Fire, Everest, Death Valley, Mt. St. Helens, Earth's Deadliest Eruptions, Ice Age, America's Gold. Each hour is a good overview of the topic, and uses historical and new video with good history. They use different people and places to trace plate tectonics and its effects. Rockies ends with the Rio Grand Fault that may eventually tear North America apart - something I knew nothing about. Birth of the Earth is really nifty, and the graphics are excellent. And they show 4.2-billion-year-old banded iron formations. How cool is that? Again, this is a worthwhile series to watch to see different slices of earth history. I learned a whole lot of new stuff, even though this series is fairly 'old'.