Earth tones remind us of the natural world, a delightful familiarity that's welcome in just about any room. In many ways, the ...

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Before plants ruled, Earth may have glowed violet. The first life forms used retinal instead of chlorophyll, absorbing green light and reflecting red and blue—turning the planet an eerie purple.

This Earth Day, celebrate our planet and promote sustainability with printable Earth Day bookmarks to color. Whether you’re coloring them yourself, sharing them with others, or using them as ...

During the total lunar eclipse early Friday morning, the moon will still be visible in the night sky, but its color will change. Here's when and how to see the Blood Moon.

Narrator: Believe it or not, this is a diamond. And the reason you can't see it is because it's covered with the darkest color on Earth. In fact, this material is so dark that it captures at least ...