The brighter blue just means that you haven't visited the link lately.
That's a great question Stephanie, I always wondered why as well, but I think Uninvited Writer has answered it before I have had the chance to research it for ya. She beat me to the punch, I think I'll still go do some research on it to make sure she's right.
The brighter ones are the ones you didn't visit yet, darker ones you already checked!
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.