Discover how researchers are using Tamm plasmonic photonic crystals and antimony trisulfide to create reconfigurable color ...

Your blood is also red because of a mixture of iron and oxygen in a molecule called hemoglobin. So in a way, the ancient connection between the planet Mars and blood wasn’t completely wrong. Rust, ...

What color is moonlight typically, and what other colors can moonlight look like from our perspective on Earth?

The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor butterflies. But if you look closely at the visible-light portion of the ...