A recent study observed sleeping participants' pupils during sleep, using a new method that could have implications for ...

So, what was a third eyelid doing in a human? Most refer to such bits of tissue as vestigial. The word means a structure that ...

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

Because of this, the scientists reason that people with the same common eye color may share personality traits. And that isn't the only scientific study linking eye color to personality.