Well, some people think that what happen in Portal is somewhere between Half Life2 and Half Life 2 : Episode 2 so I thought that Aperture have already got the ability to have at least one Crystal. Anyway, I don't have any clue about the time that the Borealis was found missing.
Beforce Chell escaped from Aperture ( in Portal ), there is someone else, someone who has succeed in escaped from Aperture, someone used to be used like Chell. The evidence of this theory is the marks and words on the wall which led Chell directly to GLaDOS. Who is this guy? If this one has...