Scientists are predicting that Earth's eighth continent could develop a lot sooner than initially thought. We'll be long dead ...

The eighth planet in our solar system, Neptune is the farthest planet from the sun, more than 30 times farther away than Earth. It takes more than four hours for sunlight to reach Neptune.

Though scientists aren't sure how the lithosphere came to be divided into plates, certain aspects of Earth's geology keep the plate tectonic engine chugging along. For a planet to sustain plate ...