Ever wondered what the most common eye colors are? Well, they might not be exactly what you expected them to be.

Like most human traits, blue eyes are determined by ... Unlike some other inherited traits (like the color of your hair), eye color typically doesn’t change naturally throughout your life.

Now, research has revealed these stunning birds are also sending secret color signals that are invisible to human eyes. Plumage and body parts of birds-of-paradise glow in certain areas when ...