Abundance of Earth-like Exoplanets The universe has no shortage of similarities to Earth when it comes to celestial ...

"The earth is my mother, and on her bosom I shall repose." Attributed to Tecumseh in the early 1800s, this statement is frequently cited to uphold the view, long and widely proclaimed in scholarly and ...

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 ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...