The deep blue sea may not have always been ... depending on the chemical makeup of the water. The oceans were likely once a vibrant green color between 3.8 and 1.8 billion years ago, according ...

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 ...

While it looks just as real as red or blue, purple is actually an optical illusion crafted by your brain. Look closely at a rainbow, and you’ll spot red, orange, yellow, green, blue, and violet ...

Purple is white light with the green colour removed ... waiting in the wings. Only blue and the red light would have filtered down through the water. It wasn't the light with the most energy ...