Why do hornets construct their nests the way they do?

You'll have to Bing it for details but I assume it has the same function as bees and ant hills. It evolved as the best layout for a combination of ventilation/heating/cooling, colony defense, and providing the space they need.

Looking for information on how to construct a window valance.

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.