Whoa! Slow Down...
This is very entertaining, if not exactly of pressing importance! But she implied that Mercury is tidally locked with one side always facing the sun. It has been known since the 1960s that its tidal lock is in a 3:2 spin orbit resonance. It doesn't always have one side facing the sun.
Still, I wouldn't want to live there!!
@phxbillcee It would actually be better if it did keep one side facing the sun all the time, as there might then be a twilight zone in between super hot and super cold where you could survive.
@Coffeo Larry Niven, & some other Sci-Fi authors have written about that very thing.