What's their secret? If they can live for such a long time, maybe we humans needed to learn how we can adopt what their secret is for ourselves. I think living for a few thousand years, and looking decent while at it, could be very interesting. Imagine if you were 3,000 years old now and all that you would know as fact over fiction in human history, granted you had the position to know. Recall, they were horrible to those who were privileged.

The secret is that they never stop growing, and their telomeres don't shorten during meiosis like ours do (which causes aging). Scientists are currently trying to figure out how to keep telomeres at a continuous length.