Blueprints or schematics of some sort of round mechanical device appear on the Mosaic Investigation wall in Mark's flashforward. The mechanical drawings, which contain Greek lettering, appear to be a modern reconstruction of an Antikythera mechanism, an ancient Greek device used to calculate astronomical positions.
Janis Hawk goes to antiquities professor Carl Corey to see if he can make sense of the blueprints. Corey immediately identifies the blueprints as being similar to those for the Antikythera mechanism, an ancient Greek device used to calculate astronomical positions. ("Goodbye Yellow Brick Road")
Later, on orders from Carline, Janis shuts down power in Corey's building and steals Corey's copy of the blueprints. Janis also tries to steal the copy of the blueprints on the Mosaic Investigation wall, but is caught by Mark Benford and thus prevented from doing so, though she manages to come up with a plausible excuse for her actions. ("Goodbye Yellow Brick Road")
Corey took photographs of the blueprints on his cell phone before Janis stole the blueprints from him. Corey is able to determine that the device is supposed to calculate dates, most prominent among them October 6, 2009, the date of the Global Blackout. ("Goodbye Yellow Brick Road")
- Theories for these unanswered questions should go on this article's theory page.