Premise: Mirage Studios is an independent American comic book company founded in 1983 by Kevin Eastman and Peter Laird in Dover, New Hampshire, and currently based in Northampton, Massachusetts. They are best known for the "Teenage Mutant Ninja Turtles" comic book series and the subsequent franchise it has spawned.
Hypothesis: Mirage Studios used to be in Dover, New Hampshire but now is based in Northampton, Massachusetts so that Kevin and Peter could be closer to their families.