Earth’s early history is undergoing a quiet revolution. Long assumed to be dry at its core, new research suggests our planet may have formed with a massive internal water reservoir—locked deep within ...

From the deck of a ship or the window of a plane, it feels obvious that “down” points toward Earth and “up” points toward the ...

Two enormous structures that sit at the border between the Earth’s mantle and its core have puzzled scientists for decades, defying reigning theories of how our planet came to be. In a new study ...