The issue here is not the prediction. Ofcourse, comets and asteroids are always likely to hit the earth in the future and we are all capable of making the prediction. The point here is that someone understood the concept of comets and asteroids 2000 years ago. The also understood that one could come crashing to earth. They further determined that such an event could wipe out a percentage of life here on earth. Considering that most of the advances in astronomy have been made within the last 300years, the fact that early humans had access to this information is staggering.
First I doubt that prediction is true. Let's get chapter and verse and see just what you are really talking about.
I bet it will not be all that staggering.
Anyone so limited that they can only spell a word one way is severely handicapped!