After recent episodes ive (and im sure others have) noticed one of "the others" named richard doesnt get older. He has been seen in a number of occations.
In season 3, a ben flashback, we see when ben runs off he runs into richard in the jungle as richard was one of the hostiles. he asks ben was he lost and he looks mid thithys.
Another scene he was in was when locke joined the others and he explains to locke its pretty amazing how a man in a wheelchair somehow able to walk. again he looks mid thirthys the same age as he was when ben was a kid.
The most confusing one is a recent episode with john locke flashback showing him growing up. When john was born Richard yet again was there with him and he looks the same even a bit older than other scenes and it begs the question.....
who and what is richard