Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

Researchers have discovered cratonic thinning occurring beneath North America, driven by the remnants of the Farallon Plate.

This comes as the insects are rapidly declining and are under consideration for Endangered Species Act protections.

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

By Michael Harmon In the 19th and 20th centuries, railroads revolutionized transportation in North America ... the former Algoma Central Railway slices through the 1.2-billion-year-old Agawa ...

On a map you can see a wave of peak migration move up from the southernmost United States to the far north as temperatures ... forests and migrate to Central and South America or the Caribbean.

Those species might simply change their elevation depending on ... Areas of high migration include Iowa, central Texas and up into Oklahoma. In North America, birds typically fly south for the ...

Those species might simply change their elevation depending ... There's also a migration prediction map that shows upcoming nocturnal migrations. In North America, birds typically fly south ...

That ram was taken in September 1962 near the north fork of the Saskatchewan River in Alberta ... District 501 is in the ...