Picture a primordial Earth: a world of muted browns, grays and greens. Fast forward to today, and Earth teems with a ...

Purple Earth Hypothesis suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for ...

"Why are there so many songs about rainbows?" sings Kermit the Frog in a song (about rainbows) called "Rainbow Connection" from 1979's "The Muppet Movie." And it's not just songs that feature rainbows ...

Picture a primordial Earth: a world of muted browns, greys and greens. Fast forward to today, and Earth teems with a ...

There are three primary colours: red, green and blue. They can be combined in different ways to make every other colour. The colour of an object is determined by the wavelength of light that it ...

Not only does it feature blue light for acne (with a wavelength of 463 nanometers), it also includes red light for wrinkles, green light for radiance, yellow light to reduce redness, soothing and ...