1. These photos from Journal of the American Society of Plastic Surgeons.
The woman on the left is the non-smoker.
2. They show the interesting differences (or lack thereof) between smokers and nonsmokers.
The brother on the right smoked 14 years longer than the brother on the left.
3. The main differences between the faces were seen in the eyelid’s skin, lower lid bags, upper lip wrinkles, lower lip wrinkles, and jowls.
The twin on right is the smoker.