Or...
Zap_98 (zap0000@hotmail.com) writes:
I don't believe that the Forerunner are genetically related to us. I believe that the Forerunner†were watching us, that they observed us evolving. They kept records of our advancements. Then, they disappeared. Because of that, they could no longer observe us. "Lost time" refers to what they missed of our development. So now, they get to catch upon the history they missed.