Earth—our home planet—is the third planet from the Sun, and the only place we know of so far that’s inhabited by living things. It’s also the only planet in our solar system with liquid water on the surface.

The only planet in the universe that we know for sure is inhabited by life. Our blue planet is truly unique, with its abundance of water, its diverse ecosystems, and its fascinating geology. On Earth, you’ll find everything from towering mountains to deep oceans, and everything in between. But one of Earth’s most special features is its atmosphere. It’s the perfect blend of gases that allows life to flourish. And with just the right amount of oxygen, Earth is the only planet where humans can breathe without assistance.