A neutron reactor (Institut Laue-Langevin). The mix between 80’s concrete bunker like structure or yellow steel bars and uber high tech mirrors that reflect neutrons is amazing, as is the crudeness of the experiments that achieve the best matter probing on earth. It’s straight out of retro-futuristic sci-fi, and at the same time higher tech than many modern sci-fi will imagine in some technical areas.
Ukraine has no nuclear weapons. Nuclear arsenal is basically meant to face nato/USA in Russia.
Ukraine invading Russia is a humiliation. But it’s not a real threat for now. Russia didn’t even declared the state of war yet.
I’ve heard that Russia can’t really use atomic bomb against Ukraine because Ukraine has no atomic bombs itself. If it did, it would spark nuclear proliferation by breaking a tabou. And China wouldn’t allow that, because they don’t want Taiwan to get the bomb.
But nato is an atomic power. Thus, atomic bombs are fair game.