Board Thread:Off Topic/@comment-4659579-20130915082315/@comment-64.254.52.73-20150305111330

I believe it is for fat storage, a lot reptiles store fat for lean times, most commonly in the tail. A female argonian's fat storage area may be the breasts, while males center it around the stomach (I mean, look at a male argonian's gut in skyrim, to me it looks a little more rounded than some other races in the game).

As for evolution, I don't really think evolution really exists in elder scrolls lore, not natural evolution anyway, from what I can tell most things in tes diverge from one another because of magic. Example: the chimer becoming the dunmer (Magic caused by Azura), the ancestors of the orcs becoming orsimer because of what Boethia did to Trinimac (magic again), so on and so forth. Magicka in some shape or form is responsible for just about everything in tes lore, a simple yet non-detailed explanation; how? magic, specifics? dunno.