health

One of these twins smoke. The other one doesn't. Can you guess who's who?

We all know smoking has terrible health consequences.

But these photos — used for research carried out at Case Western University in the US — offer a compelling visual demonstration of how smoking changes our features.

Take a look at each of these sets of identical twins and see if you can guess which is the smoker. We guessed every single one correctly, suggesting that long-term smoking ages faces in a pretty drastic way:

Answer: the twin on the right is the smoker.

Answer: the twin on the left is the smoker.

Answer: The twin on the right is the smoker.

Answer: The twin on the right is the smoker.

Answer: both are smokers, but the twin on the right has been smoking for 14 years longer than the twin on the left.

Answer: The twin on the right is the smoker.

Answer: The twin on the left is the smoker.

Did you guess right? Would images like this put you off smoking forever?

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