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At the far end of the periodic table is a realm where nothing is quite as it should be. The elements here, starting at atomic number 104 (rutherfordium), have never been found in nature. In fact, they ...

Standard atomic weights, those numbers emblazoned under the elements on the periodic table, were once thought of as unchanging constants of nature. But researchers have tweaked the atomic weights of ...

Scientists now understand that the universe forges its heaviest elements, including californium, through extreme cosmic events like neutron star mergers. These cataclysmic collisions provide the ...