Missing Link Theory

Ok. I was thinking about how some have said that humans have been around for 200000 years and if the halos went off, than we would not be here and that the original humans would of had a catastrophe. Well, i was thinking maybe the people around the Ark were put into it and were kept safe from the Halos firing. That would be why there are still humans ans why we have a "Missing Link" in the evolution theory.