PBS
The World Before Plate Tectonics
There was a time in Earth’s history that was so stable, geologists once called it the Boring Billion. But the fact is, this period was anything but boring. In fact, it set the stage for our modern version of plate tectonics - and...
SciShow
That Time North America Tried to Tear Itself Apart
Looking at a map, you would never know that North America once almost ripped itself in half. But 1.1 billion years ago, it tried to - and had it succeeded, there would now be an ocean where Lake Superior is!
Curated Video
Seafloor spreading
The spreading of the seafloor around mid-ocean ridges as new rock is formed in between two tectonic plates. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Incorporated Research Institutions for Seismology
Iris: Plate Movement 200 Million Years Ago to Today
A time-lapse animation of seafloor spreading and plate tectonic evolution of the planet since 200 million years ago. [0:22]