Ever wonder why the sky is blue, vs. say red, orange or purple? An effect called Rayleigh Scattering is part of the reason we ...

An exotic colour at the far end of our visible spectrum and often associated with royalty, purple is relatively rare in nature. But some vibrant plants, animals and fungi do show off a regal purple, ...

The most colorful of all may just be rainbow obsidian, which features an array of iridescent colors, including shades of green, purple, and blue. Colorful, sure, but we’d say it reminds us more ...