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

Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising ...

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with oxygen.

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.

Today, the world's oceans appear deep blue, contrasting with the light blue color of the sky ... which would have made Earth look green from a distance. Over the green-ocean period, the ...

For a long stretch of Earth’s history, our planet might have looked green from a distance, instead of the pale blue dot we know today. Earth’s green period, which lasted from around 3 billion ...

The green-tinged Comet Nishimura is zipping past Earth, and you have a few days to ... vaporizing its ice — is a "pleasing blue-green color," King added. Read next ...