Scientists at the LNGS research centre in Gran Sasso, Italy say they have observed an “ultra-rare” event in their quest to solve the mysteries of dark matter. XENON1T, the underground laboratory’s dark matter detector captured the radioactive decay of xenon-124, a process believed to be one trillion times longer than the life of the universe. To achieve this, the scientists measured the half-life of the atoms. XENON1T consists of a cylindrical tank that’s filled with over 3,000 kilogrammes of liquid xenon cooled to -95 degrees Celsius.
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