Enter the Argonian: a (really) ugly sentient human-like lizard. Although almost no one plays as this race on their Skyrim playthroughs, they have some pretty astounding capabilities; they are masters of guerilla warfare, can breathe underwater, can communicate in a spoken language, and have lifespans similar to those of humans.
What evolution could support the existence of such creatures? Could the Argonians even exist, biologically speaking?
This question is part of the Anatomically Correct Series.