Auribus oculi fideliores sunt.

Auribus Oculi Fideliores Sunt is the name of an independent paparazzi-like web site that focuses mainly around, as it is been revealed by this point, tracking down and recording the movements of the celebrities and spreading rumors that circle around Academy City (even further).

Etymology
The sentence Auribus Oculi Fideliores Sunt is Latin for The Eyes Are More Trustworthy Than The Ears, a reference to how the site focuses on spreading rumors with the help of photographic pictures rather than just hearsays.

Principles
Its unnamed and unseen editor is mentioned to be an Esper with the power to make extremely clear photographic pictures by using reflections and reflective surfaces (even a mere drop of water can be used as an acceptable reflective surface).

Daihasei Festival Arc
While not exactly knowing where Exterior was located, it is implied that Kihara Gensei used or even instigated the Urban Legend website Auribus oculi fideliores sunt to look for it, as the long sought key of what he believes is the path for the 'evolution of science'.