Life on Earth may exist thanks to an incredible stroke of luck — a chemical sweet spot that most planets miss during their formation but ours managed to hit.

Geologists Solve 150-Year Mystery of Why Green River Flows 'Uphill' Through Mountains ...

Mars, a world now circled by two lumpy rocks, may once have hosted a colossal companion that dominated its sky. New work on the planet’s tides, topography and wobbly interior points to a “lost” ...

As much as 45 oceans’ worth of hydrogen may be in Earth’s core, scientists reported, suggesting most of Earth’s water was acquired during the planet’s formation.

Hydrogen reserves in Earth’s core large enough to supply at least nine oceans may influence processes on the surface today.

Unusual isotopic ratio in samples brought back by Chang'e-6 reveals clues about the early history of Earth's satellite ...