Ukraine’s airspace has been busy this year—that’s the nature of war. But scientists in the country are looking to the skies and seeing something they didn’t expect: An inordinate number of UFOs, according to a new preprint paper published by Kyiv’s Main Astronomical Observatory in coordination with the country’s National Academy of Science.

The paper does not specifically address the war, but in the United States, the Pentagon has long hinted, speculated, and warned that some UFOs could be advanced technology from foreign militaries, specifically China and Russia (though it hasn’t really given any evidence this is actually the case). The Ukraine paper is particularly notable because it not only shows that science has continued to occur during the war, but also explains that there have been a lot of sightings.

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