Fact of the Day: In today’s series of daily facts, we will discuss and explore the Earth, a planet formed by water, rock, air, and time. Earth is not one of the largest planets in our solar system, ...

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 ...