Earth's oceans, known for their deep blue hue, could one day undergo color shifts, say scientists. A report based on a study ...

Earth's oceans could one day turn purple. Nearly three fourths of Earth is covered by oceans, making the planet look like a ...

We all know Mars is called “The Red Planet,” but have you ever stopped to wonder—why is it red? The classic joke explanation ...

The first life forms used retinal instead of chlorophyll, absorbing green light and reflecting red and blue—turning the planet an eerie purple. Chlorophyll wasn’t always king. Retinal ...

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Color is an indicator of great importance in the general balance of nature, it is a concrete visual message that tells everything about the element it represents ...

Printable Earth Day bookmarks are a fun way to celebrate the planet and encourage kids to read at the same time. These Earth Day printable activities work well at home or in the classroom, giving kids ...