There is no physical/chemical/biological reason you can’t live indefinitely with the health and vitality of a 25-35 year old. Aging isn’t a law of nature.
It out of my wheelhouse but isn't telomeres a physical/chemical/biological reason we can't live forever?
I believe the argument would go "there's no fundamental reason we can't fix telomeres".
Isn't the reason cancer? Eventually the DNA copying errors add up.