Board Thread:General Discussion/@comment-32773930-20170827054513/@comment-26074798-20170827055242

I will simply answer the first question, "Dragon Born Do Age." The reason Miraak didn't age is because of his deal with Hermaeus Mora, not "dimensions," or more correctly planes, not dimensions.

Furthermore, your theory lacks actual evidence with the statement above. There is no reason to assume a Dragonborn lives any longer than a regular person specifically because they are Dragonborn, and can absorb dragon souls.