Throw out your old periodic tables, kids - - science is pushing the boundaries of matter yet again! "Four new elements have been permanently added to the periodic table, after their discoveries were verified by the global chemistry organization that oversees the table. The International Union of Pure and Applied Chemistry (IUPAC) last week announced that elements 113, 115, 117, and 118 have met its criteria for discovery, making them the first elements to be added to the periodic table since 2011. Their addition also completes the seventh row of the periodic table. All four man-made elements currently have placeholder names, and will be officially named over the next few months. Elements 115, 117, and 118 were discovered by a team of scientists from the Joint Institute for Nuclear Research in Dubna, Russia and Lawrence Livermore National Laboratory in California. The Russian-American team had also claimed discovery of element 113, currently known as ununtrium, but IUPAC credited a team from the Riken institute in Japan. Element 113 will therefore be the first element to be named by researchers in Asia. Discovering superheavy elements has proven difficult because they rapidly decay. But research has revealed slightly longer lifetimes for more recent superheavy elements, raising hopes that scientists may eventually discover the so-called "island of stability" — a group of elements that are both superheavy and stable. Kosuke Morita, who led research on element 113 at Riken, said in a statement that his team will now "look to the uncharted territory of element 119 and beyond." "To scientists, this is of greater value than an Olympic gold medal," Ryoji Noyori, the former president of Riken and Nobel laureate in chemistry, tells The Guardian." Official names for the new elements have not been announced yet, but are expected to be ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118).