SciShow
What We Can Learn from 5 Times Rivers Ran Backward
Usually, you can count on a river to flow in one direction, but some things can make it reverse course. Aside from being weird and surprising, these river reversals can often reflect geological changes and have long-lasting impacts on...
Incorporated Research Institutions for Seismology
Iris: New Madrid Region: Geologic History in Cross Section
Studies of the rocks in New Madrid tell quite a story. This is an animation illustrating how the scenery changed over 500 million years. [0:54]