Lava that erupts from hotspots around the world seems to come from a similar ancestral magma, new research finds.

They used a thick, gooey polymer to represent the middle mantle, and a mix of clay and the polymer for the more rigid upper mantle, topping it off with a silica-and-ceramic "crust." When left to ...

Earth's crust may "drip" into its middle layer under growing mountain ... of the crust and the relatively brittle upper layer of the mantle, gets especially thick. Mountains create a lot of ...