The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...
The ground is cooler in summer and warmer in ... taking account of the modifications which the configuration of the earth's surface and the proximity of veins of ore, seams of coal, and volcanic ...
A research team including a University of Michigan scientist has discovered a new gold-sulfur complex that helps researchers understand how gold deposits are formed. Gold in ore deposits ...
A mountain of hydrogen is lurking beneath Earth's surface — and scientists say ... 26 times the amount of oil known to be left in the ground (1.6 trillion barrels, each weighing approximately ...