The color of light, expressed in Kelvins (K). The sun is about 5800 Kelvins. This is called a "temperature," because the hotter fire gets, the more it changes from a warm yellow glow to white.

New shelves, hangers, and organizers can go a long way to upgrade your closet, but this inexpensive and unexpected hack can ...

Scientists at CNRS have synthesized copper-based compounds whose luminescence changes color irreversibly once a critical ...