User blog comment:Master Sima Yi/Assassinews 19-03-'14 – Two Assassin's Creeds for 2014?: Unity and Comet/@comment-187.38.115.3-20140320183626/@comment-4950493-20140321102628

I thought the catastrophe was prevented by the first solution, the four towers the First Civ built. Juno said they ran out of time and never completed them but some people returned afterwards to the unfinished towers to program automatic devices that would slowly complete them, which meant they were finished by modern day.