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

To observers from outer space, Earth's vast oceans and verdant ... or no visible light and oxygen could retain a purple hue. "We think about green plants and then blue oceans and then another ...

Earth’s oceans once looked green—and could turn purple or red due to climate and volcanic changes. Find out what it means for ...