got a idea from taling with a friend about the rats of nimh. the idea take a test group of rats that developed a more human-like intelegence that escaped (mice and gerbils as well, but they a seperate) then have them create a colony under a building in the city (just like the book so far right?) well, I believe the average lifespan of a rat is 3 years (or 3 winters) show the story 20-30 years later (many generation for the rats, with NO ONE from the original experiment still alive) with the colony now far underground and run like a midevil (feudal system?) goverment, with no dependance on human technology. (humans tend to cause more trouble than scavenging from them is worth it seems). the colony is now on the brink of civil war, as winter is coming close (big note, because of the experiment the rats cannot hibernate at all. and so winter can bring death to the un-prepared) the idea wished to be drawn.