I'd note a simple possible solution to the Fermi paradox: A physics experiment that is logical to do, will discover new physics -- with really big and unexpecte

I'd note a simple possible solution to the Fermi paradox: A physics experiment that is logical to do, will discover new physics -- with really big and unexpected results. Or something like that. It seems something kills (or hides) civilizations. The weaponized diseases were worse than anything natural (e.g. optimized to get a really toxic immune system reaction and so on). And multiple ones could be used at the same time, with different spread mechanisms and incubation times. But about Ebola -- I have no clue if the kill ratios can be engineered to not go down for a fast spreading disease. (And if I did, I would not be able to talk about it, of course.) Those militarized diseases are easily enough for an economical (/civilization) collapse, that would take the world at least generations to recover from. Which is bad enough, but is no extinction of course. I don't know if nuclear weapons are on the table again, despite that they are spoken about in Russia -- it is probably just psychological warfare (maskarovka), everything new from there seems to be a smoke screen. But how hard would it be for Iran or North Korea to build a Cobalt bomb, the doomsday machine out of Dr Strangelove?