A section of the Appalachian Mountains discovered in Mexico is forcing scientists to redraw their maps of ancient Earth. The Appalachians are a series of mountain ranges in eastern North America ...

And often they’re found in groups called mountain ranges ... individual peaks by ancient volcanoes. De-Graft joins two local children to explore the contour lines of a map and what they reveal.

which resulted from an abundance of ancient ocean life. When we look at vast mountain ranges like the Himalayas, the Alps, the Rockies, and the Andes, it's easy to get a sense of the tremendous ...