To create the map, the researchers amassed over 2,000 stress orientations taken across North America, of which 300 are brand new. These measurements were taken from boreholes—long, narrow shafts ...

Around 1930, an employee with the U.S. Geological Survey simply took a cutout of the map of North America, and balanced it on the top of a pin. Not the most sophisticated method, perhaps, but for ...

While the U.S. teaches that there are seven continents, Europe teaches that there are only six, with North and South America counting as one consolidated America. Some combine Europe and Asia into ...

The continent of North America is not a single, thick, rigid slab, but is instead more similar to a layer cake, with a section of 3-billion-year-old rock sitting atop much newer material, a new ...