A team of nuclear physicists affiliated with multiple institutions in Japan, working with a colleague from Korea, has discovered a previously unknown uranium isotope with atomic number 92 and mass 241. In their study, reported in the journal Physical Review Letters, the group forced the isotope to reveal itself and tested the results of their efforts to show that what they had found was indeed uranium-241.

Russian President Vladimir Putin on Tuesday condemned British plans to send tank ammunition that contains depleted uranium to Ukraine, saying Moscow would be forced to respond accordingly.