If the ranges do not intersect, then you may store them as pairs of INT values.
Normally, I wouldn't try to reduce the number of rows just for the sake of it - in principle, a well-indexed table with a billion rows should be just as quick as a table with 100 rows, as long as your queries hit the index.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.