
Earth is the only planet in our solar system that is suitable for life. It has liquid water, oxygen, and enough gravity to hold its own atmosphere, but do your readers know that Earth is always changing? Scientists have used spacecraft and satellites to learn more about our planet...

Earth is the only planet in our solar system that is suitable for life. It has liquid water, oxygen, and enough gravity to hold its own atmosphere, but do your readers know that Earth is always changing? Scientists have used spacecraft and satellites to learn more about our planet...