In a bar not too far off the road, a man walks in. his boots clattering on the wooden floor. The bar is noticeably empty with only a few guys still around either drinking or chatting. Not too surprising since it is already the evening and they probably went home. The smell of smoke and liquor still hangs in the air like a fly caught in a web. The man in the trench coat pulls himself on a stool near the counter. His face covered by a bandanna and the brim of his hat obscuring the view of his eyes. The bartender, who had been cleaning a beer glass, looks up.
"So what'll it be, stranger?"
The man responds in a gruff and tired voice. "Dark and Stormy."
A race of beings actually IS invunerable while in adolecence. They age, but cannot be killed. A miniority of the race (1 in 20) does not become invunerable, but rather becomes immortal at some point in thier adolecence, and ceases aging while being vunerable to death in all the normal ways. Another minority (also 1 in 20) Permanatly becomes invunerable after adolecence, but ages twice as fast as the race normally does. There is no known way to test for which of the three traits an individual manifests and the three traits cannot mix, as they are tied to the same gene, as it were.