Why do biters die far away from your base, in unexplored areas?
This causes a lot of loot drops for mods like mine that adds small alien artifact drops to corpses.
Here is an example
http://imgur.com/jp9HsHh
I think it might be a pathfinder thing - if they fail to path they are killed?
Do they die from old age?

Is there a way to prevent loot drops from these biters that just die?
Thanks.