Thousands of objects sent by a non-human intelligence may have been spying on the world's nuclear tests all the way back in the 1940s.

A groundbreaking study has just been published, providing verified evidence that something or someone was observing our nuclear sites from space long before the first human satellites were ever launched into orbit.

Dr Beatriz Villarroel from the Nordic Institute for Theoretical Physics in Sweden revealed a clear connection between nuclear tests between 1949 and 1957 and an increase in the number of mysterious bright spots called 'transients' appearing in the sky.

These transients are not believed to be a natural phenomenon, with Villarroel saying they showed signs of being highly reflective, like a mirror, and even spinning like a flying saucer.

The publication of these findings was a major milestone, as most papers discussing the existence of unidentified anomalous phenomena (UAPs) are rejected by the scientific community.

Having the work successfully peer-reviewed means other scientists have looked over the data and could not find anything to dismiss the team's findings as just another unproven story about UFOs.

Overall, researchers discovered that the mysterious transients were 45 percent more likely to be spotted flying overhead just before or right after a nuclear test.

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