You obsess over forehead wrinkles and nasolabial folds while completely ignoring the subtle changes happening to your eyelids – the delicate skin that’s actually aging faster than anywhere else on ...

A cat has upper and lower eyelids that meet when the eye closes, along with a mysterious third eyelid—more properly called the palpebra tertia, also known as the nictitating membrane or “haw.” Tucked ...