As we've seen, Adam (aka Kensei) has the same power as Claire. He's lived 500 some odd years and he's still the same age as when he acquired his powers. Does this mean the same thing will happen to Claire since she developed her powers at this age?

Claire will age until she is fully matured, then she will stop aging.(if their powers are truly the same) Adam didn't age because he had passed his "prime" when his power manifested, so he will stay that "age".

as long as she grows old enough to be 18, im fine

Yes please, don't make her stay a minor, forever.

aging has nothing to do with how old you are.

Except in the eyes of the law

I think "nothing" is a bit of a stretch on that one.

She'll probably grow to be around 25, or likely early 20-ish... then "freeze" in that shape indefinitely...

Perfect!

While they obviously can both regenerate, it is not logical to say they both can live 100s of years.

Why not?

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*headache

I hate this discussion.
I really hope Claire DOES age...

She pretty much has to since Hayden will.

Mainly it is not known, yet that is, how Adam got to the present time. It is also not known that his regeneration is the cause of his seemingly being able to live up until the present time. Personally, I think there is some explanation regarding him being able to live a long time, but that does not mean the same applies to Claire.

Why wouldn't it mean the same thing? Why does everyone think their powers are different. Heroes' even prided in the fact that they would be showing multiple characters with the same ability this season.

Answer this: How would you age or DIE if your cells could regenerate? How would your heart ever fail if it was in a constant state of repair?

A natural death is seemingly IMPOSSIBLE if your bodies cells could regenerate instantly.

I understand what you are saying, but I also understand that it has not been stated in the show or by anyone directly involved with the show that Adam is "immortal" and even if so, that Claire is also "immortal". That is the point I am making.

You said it yourself, its "seemingly" impossible. There is room for any of us to be wrong at this point.

Well, the ages of 25-30 are when the body's tissues start dying faster than they can replace themselves,(which is when we really start aging) so she'll probably hit somewhere in between there and stop aging completely.

True. The word 'immortal' hasn't been used in the show. I don't think they are necessarily immortal, because that implies the impossibility of death. This would be the "seemingly" part. lol..

Im sure they CAN die.. its just figuring out how.

I dont think its too farfetched to assume there are some wounds or natural causes they cant heal from.

Nobody said that they were immortal. Claire has died multiple times, and it is sometimes only by luck that she comes back to life.

If Claire's head had been punctured with the stick for a few days (or weeks?) , she would've died.

?? I don't agree with your point here. Medically that is not true. Your body starts the "dying" process (as I think you are defining this term) at the moment of conception. I don't know where you got this information, but it isn't true. The growth of a person as they reach past puberty is more related to the time when the bones start fusing, which is about the age of 18 years. The tissues, however continue to age and change throughout life. Not all cells in the body turn over at the same rate, there are some cells that never regenerate (muscle and nerve cells to be precise) and others that turn over at fast, moderate and slow rates. The process of "dying" is multifactoral, and caused by more than cellular damage or genetic malfunction, and this whole process of exactly how Claire does the regeneration thing is way more complex than the writers can even imagine, so don't think too hard about it. She will either remain at the age she is now, continue to age until a certain limit, or go on to normal death, depending on how the writers portray it, and don't expect there to be any kind of continuity related to the powers that have been shown in the past. It's painfully obvious that the writers don't have any experience with the biologic, physical and chemical nature of the physical world to portray that into the powers that these characters have. It's fun to theorize, but if you spot plot holes, then good for you, but don't hold that up to any serious light.

So says I.

Here is what I think: Claire is not immortal, neither is Peter.
Making a show about immortality is a totally other thing, and it has a name: Highlander.
Heroes's not about that. You can't just bring the immortality theme here, it would completely change the whole story. Everything would be centered on the immortals.
So I think that 1/ either Adam/Kensei is immortal, but that's an anomaly which CAN'T be copied by Peter nor Sylar 2/ or Adam/Kensei is NOT immortal, but time travelled till the 21st century.
If not, if Adam is indeed immortal and if his immortality can be duplicated, then Peter becomes immortal, too, and the show has to be renamed from "Heroes" to "Peter's Story" or "The Immortal"...

Yeah: "There Can Be Only One (show with immortal people in it).

It's like this: Aside from Peter, there are two people that we know of with the same regenerative powers. There are two people who can fly, and two people who can manipulate the mind. That's three duplications right there.

It's no big deal if they have the same powers! Spiderman and Superman are both very strong, for example, and Batman and Wonder Woman both use gadgets, and Xavier and Jean Grey both have mental powers.

Besides, anyone, no matter how immortal, can be dropped into a live volcano. No one can live through that. Except maybe Meredith. And Jonny Storm.

I think what happens is they can control their tissue regeneration willingly. That is, they can turn it off or on (it's on by default). They could turn it off to age a bit...who wants to look 16 forever? I'd let myself age and then regen perpetually at 25...like Kensai.