Every single science textbook in the world is now out of date after four new elements were added to the periodic table, finally completing the seventh row.
Elements 113, 115, 117 and 118 were added at the very end of 2015, marking the first time new atoms have been added to the table since 2011.
The International Union of Pure and Applied Chemistry (IUPAC) deemed that there was sufficient evidence provided by the researchers to claim the discovery of the four new elements. It approved the new elements on December 30.
Element 113, which has a temporary working name of ununtrium and a symbol Uut, was discovered by a Japanese team at the Riken Institute.
Elements 115, 117, and 118, which have the temporary working names of ununpentium, ununseptium and ununoctium respectively, were discovered by Russian and American researchers.