We look up to see a sky awash in shades of blue, deepening at noon and softening toward dusk, yet the reason behind this hue often remains a mystery. However the science behind the color is ...

but depending on what else is in the sky, another kind of scattering may dictate the final color. The blue of the sky comes from Mars’ atmosphere and the ozone absorbing other colors.

Marshmallow Sky is officially Ben & Jerry’s brightest pint to date. The ice cream gets its electric blue color from spirulina extract, a blue-green algae that’s certainly having a moment in ...