The deep blue sea may ... and may "favor purple sulphur bacteria living in deep waters without oxygen." In different circumstances, the ocean could even turn red, brown or green again.

Scientists have resurrected a purple-blue hue whose botanical origin had ... But it fell out of use, and the watercolor’s identity has eluded scientists for decades. Now, after tracking down ...

which is predominantly green and blue,” Baseman said in a conversation for Variety Artisans presented by HBO. “And then there’s one room that’s purple, you see a little bit of it.

To observers from outer space, Earth's vast oceans and verdant landmasses make it appear as a blue world punctuated ... oxygen could retain a purple hue. "We think about green plants and then ...

Earth's sun emits a lot of green light, but humans see it as white. Purple stars are something the human eye won't easily see because our eyes are more sensitive to blue light. Since a star ...