Re: About those Piranha Bugs - LOOOOONG

Actually, that's easy. Don't treat each mound as a seperate nest. Each
mound is but a single "home" (or exit point) for a larger nest. There's
no
particular reason that they couldn't be communal on a much larger scale,
especially since they're alien. Postulate some underground tunneling and
chamber and it's even easier. Then the distance to the nearest bug
"nesting
site" could be quite large (which would also explain the locals lack of
total knowledge about the nasties).Then give a vehicle a chance to break
through the ground and fall into a main chamber! Yikes!