Can You Tell Which Twin Is A Smoker Just By Looking At Them?
Most people who start smoking, especially when they're young, think they look something like this...
...when in fact they end up looking more like this....
And while we all know the damage smoking does to your heart, lungs and various other parts of the body, one of the most notable signs that someone is a smoker can be seen on their face.
Pale skin, wrinkles and receding hairlines are all side effects suffered by regular smokers.
To highlight how smoking ages you, take a look at these eight sets of adult twins where in each case only one of the siblings is a smoker, can you work out which one?