This process is by no means perfect, and after about 200 generations the cell shows signs of aging.

For many people who had the disease, the symptoms were believed to be simply signs of normal aging in the brain.

Don't forget the delicate skin around your eyes, which typically shows the first signs of aging.

They pick people who look younger, with gray hair the only real sign of aging.

Do not assume that a symptom is a normal sign of aging.

He has yet to show any noticeable signs of aging.

It's important to remember that difficulty breathing is not a normal sign of aging.

There are many ways to prevent the signs of aging.

In 2003 Washington began to show signs of aging.

In recent years, the stadium has shown very visible signs of aging.