Been replying to comments, which are numerous and thoughtful. Apologies to the…Greek?…commenter whose comments couldn’t be translated. Deleted it in case it was a Mediterrarean….Meditirean…Med…Ionic worm.
Thanks for all the comments, to all you human commenters.
World's Only Rational Man 
Wouldn’t you want more worms about?
I keep on trying to write something else witty, but it backfires. At a bit after midnight, I think I’ll not try and just sign off.
But I thought a Mediterranean diet is supposed to be good for you!
This robot is crawling around in the room (5 Sieverts/hr. detected here) which is the source of that vent outside where the 10 Sievert/hr. + was found.