For myself, I care less about what is scientific than what is interesting. It may or may not be scientific that a long-lived race would still mature within the first few decades. Answering that question isn't particularly interesting.
But what if the periods were stretched out proportionately? What if childhood lasted a century, adolescence another two? What if a decrepit old age lasted three hundred years? Now build your culture, your practices and institutions, your perceptions of short-lived peoples, and so on. That's where things get interesting to me as a writer.
IOW, it's the fantasy worldbuilding that's interesting, not the science world building. Which is why I write fantasy rather than SF.
For Altearth (not that anyone asked) I have a simplistic take on a simple principle: smaller lives longer. So my long-lived peoples are pixies and sprites. Giants are shortest lived. I haven't worked through implications yet, but it percolates.
But what if the periods were stretched out proportionately? What if childhood lasted a century, adolescence another two? What if a decrepit old age lasted three hundred years? Now build your culture, your practices and institutions, your perceptions of short-lived peoples, and so on. That's where things get interesting to me as a writer.
IOW, it's the fantasy worldbuilding that's interesting, not the science world building. Which is why I write fantasy rather than SF.
For Altearth (not that anyone asked) I have a simplistic take on a simple principle: smaller lives longer. So my long-lived peoples are pixies and sprites. Giants are shortest lived. I haven't worked through implications yet, but it percolates.