It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something ...

The sky isn't just blue by chance. It takes all the colors of the rainbow for us to see it that way. It happens because of something called the Rayleigh effect, or Rayleigh scattering, named after ...

Whether you're scrolling your phone or staring at a computer screen, the best blue light blocking glasses are designed to filter out the wavelengths that are thought to disrupt our bodies' natural ...

Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like ...