THE student has often to regret that the aboriginal peoples of the American continents left no records which tell us anything concerning their physical history. The convulsions which affected these ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers have discovered that the North American continent is slowly losing rock from its underside in a process called ...

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 study ...