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 ...

If you live along the path of totality for Monday's solar eclipse and you have any Christmas or Hanukkah gear, you might want to break it out. The celestial event will bring odd phenomena to our ...

It's not easy being green. Scientists for years have made small red and blue lasers, but other colors, including green, have been a challenge. A team has now filled this technology gap by creating ...