The planet is almost 25,000 miles around and 4.54 billion years old, and humans are still discovering some of the amazing ...

Add Yahoo as a preferred source to see more of our stories on Google. Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth's crust is the planet's outermost layer. It is made of solid rock and sits on top of another layer, called the mantle. The ...

Earth's magnetic field protects and makes our planet habitable by stopping harmful high-energy particles from space, including from the Sun. The source of this magnetic field is the core at the centre ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...