About one percent of people worldwide can see 99 million more colors than the average person, creating a more vivid world, seeing hues invisible to most humans. Tetrachromacy is a rare genetic trait ...

If you have brown eyes, your personality shows that you are confident, friendly, and easy to talk to. People find you charming, not just in looks but also in the way you speak. You are strong-minded ...

Optical illusions have a way of turning a simple picture into a brain-bending challenge. At first glance, this puzzle looks like a wall of repeating number 8s. But hidden within this crowd is a single ...