Deep within Earth, there lies a mysterious layer called the D" layer. Located roughly 3,000 kilometers down, this zone sits just above the boundary between the planet's molten outer core and its solid ...

There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity. Our ...

When I was a kid, I liked to dig holes in my backyard in Cincinnati, Ohio. My grandfather joked that if I kept digging, I would end up in China. In fact, if I had been able to dig straight through the ...