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!

That asteroid the headlines have been warning people about isn't likely to actually hit us, and scientists might have solved a mystery that could save lives: the relationship between tides and earthquakes.

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!

Boundaries where the Earth's tectonic plates meet, where crust can be made, destroyed, and deformed as adjacent plates move.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using...

Magma from the Earth's crust routinely bubbles up, forming various types of volcanic rock on the ocean floor. What types of lava rocks can be found in the ocean? How are the formed and what happens to them over time? Plus, learn where...

This video explains the theory of continental drift and how it was eventually replaced by the theory of sea floor spreading. It gives a historical background on the challenges scientists faced in accepting the theory of continental drift...