Guild Wars 2

Hello.
I’ve got question about humat max age in Tyria. I had found an information that the oldest man was King Doric that dies in age of 120.
Is there aby posibility that human can be antique an live longer than usual?

Yest it was something like this one with getting a degree in something.
I’m still trying to find that interview

I know that there was an interview with game developers, but I cannot find it.

Can character ( Warior ) learn to cast elementalist or messmer spells? Can there be a multiple class characters arround Tyria? Or it is just that you have got natural gift to use one “school” of magic and you need to wipe out all your knowledge to learn new one from the basics?

Thanks in advance!