The Marcellus Shale holds 262,000 trillion liters of natural gas, enough to power America for centuries. Discover its impact ...

South Dakota state historian Doane Robinson writes to eminent Chicago sculptor Lorado Taft proposing that one of the "Needles" -- spiky rock formations -- of the Black Hills be carved in the ...

It still took two billion years from the formation of this rock to get to multicellular organisms, but that's another story.' The waves of colourful rock within the specimen are made up of black and ...