We love how these maps allow you to see through the thin layer of trees and vegetation that hides eons of natural processes at work. Many of Earth's processes occur on a time scale much longer than a human lifetime, making it difficult to gain a comprehensive understanding of them. What if we could lift the veil of time to see evidence accumulated over thousands of years? These maps reveal both events of short duration with multiple repeat appearances in the same area and single, long-term events working at a glacial pace. You can see something different each time you view them.