Salarians biologically different from humans. Live much shorter lives. In exchange, only require two hours of sleep. Always a consequence in science for everything.

[Oh but he can. She can wander over all she'd like. His notes are mostly in salarian. Her omni-tool might translate some of it if she's really interested.]

Have not accomplished burn out yet. Less than decade of life remains. [Much less, if Joker is to be believed.] Am not concerned.