Teemu Selanne is a pretty special player, has been for a long time. What he's doing this season however is almost unprecedented. Only two men in the history of the NHL have scored at least a point per game in a season in which they were at least 40 years of age. Teemu is well on his way to becoming the third.
Selanne turned 40 this past July and has played 29 games for Anaheim this season. He has 32 points for 1.10 points per game. The first man to accomplish this was Gordie Howe in 1968/69 at 40 years even. He scored an amazing 103 points in 76 games for 1.36 Pts/GP. Howe would go on to score almost 700 more points in the NHL and WHA combined.
The second and last man to score at a point-per-game clip as a 40 year old was Johnny Bucyk of Boston in 1975/76 who was also exactly 40. The Chief scored 83 points in 77 games, at 1.08 Pts/GP just behind Selanne's rate. Bucyk almost repeated his productivity the following year with 43 points in 49 games before falling off the pace in his last year.
As for Selanne, who knows if he plays even next year. It's obvious he is still quite capable of playing at a high level.