Our body is designed for 200-300 years of life. Only it is necessary to lead a correct way of life.
No. I have read in a few scientific journals that the maximum possible theoretical lifespan for humans is around 130 years. And in this particular case, I think that some one has rigged the census records. I don't think that this guy was 146 when he passed away.
I would not recommend you to believe in such studies. If they were right they specifically gave the recipe following which guaranteed it would be possible to live 130 years. But the same is not. So it's not a study but just a guess.