Is your green my green? Probably not. What appears as pure green to me is likely to look a bit yellowish or bluish to you. This is because visual systems vary from person to person. Moreover, an ...

Gemstones like precious opal are beautiful to look at and deceivingly complex. As you look at such gems from different angles ...

The colors of rubies and emeralds are so striking that they define shades of red and green – ruby red and emerald green. But have you ever wondered how they get those colors? One feature of compounds ...

(Nanowerk News) The color-changing capabilities of chameleons have long bewildered willing observers. The philosopher Aristotle himself was long mystified by these adaptive creatures. But while humans ...

It seemed like an easy question. The query came from a Twitter poll I spotted on my news feed last week, from user @cgpgrey. “Please help resolve a marital dispute,” @cgpgrey wrote. “You would ...