Hi. Can you tell me, with scientific references, why some of these ants (see the photos) are pressing each other into groups so intensely?

Of course. There are several ways. But it is only worthwhile using them if you are likely to be poisoned.

If you took similar precautions for every possible risk (eg that your car had not been booby-trapped, that the legs of your chair have not been sawn through, that the door handle you are about to grab has not been connected to the mains to electrify you) then you would have no time left to do anything useful or enjoyable, and you would be a nervous wreck.

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.