His wife could see the stress lines in the face of her broad-shouldered husband.

Her stress lines had become permanent since his last brother had been born.

Kathryn smiled, the stress lines around her eyes softening.

The face that stared back at him had a few unfamiliar wrinkles and stress lines.

A real close look showed she had stress lines around her eyes and mouth.

They're grown completely within a grav field, under no particular stress lines.

"These stress lines can be interpreted by computer," Rico went on.

Coquina repeated, and now the stress lines showed on her face, making her look older.

That test can pick up preexisting stress lines - which always exist in glass - and give us a rough idea of whether they'll break.

The result was pale and sickly, stress lines showing how much she would look like her mother in a few years' time.