From today's featured article
Nihonium is a synthetic chemical element with symbol Nh and atomic number 113. It is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of about 10 seconds. In the periodic table, nihonium is a transactinide element at the intersection of period 7 and group 13. Its creation was reported in 2003 by a Russian–American collaboration at the Joint Institute for Nuclear Research in Dubna, Russia, and in 2004 by a team of Japanese scientists at Riken in Wakō, Japan. The discoveries were confirmed by independent teams working in the United States, Germany, Sweden, and China. In 2015 the element was officially recognised; naming rights were assigned to Riken, as they were judged to have been first to confirm their discovery. The name, approved in the same year (announcement pictured), derives from a Japanese word for Japan, Nihon. Few details are known about nihonium, as it has only been formed in very small amounts that decay away within seconds. (Full article...)
Did you know...
King Kalākaua during his state visit
- ... that King Kalākaua's 1874–75 state visit to the United States (Kalākaua pictured) made the African-American Pacific Appeal newspaper wonder if there was "a sudden abandonment of colorphobia prejudice"?
- ... that historian Felix Römer found that 116 of 137 German World War II combat divisions he researched implemented the Commissar Order, contrary to postwar denials?
- ... that after Schafkopf and Watten, Wallachen is probably the most widely-played card game in Old Bavaria and an indispensable part of Bavarian pub culture?
- ... that the back cover of Luis Miguel's album México en la Piel was changed in 2005 because the original had altered the colors of the Mexican flag, which is illegal in Mexico?
- ... that Chang Chun-Yen, a pioneer of Taiwan's hi-tech industry, was forbidden from going abroad to study because of his father's involvement in the February 28 incident?
- ... that neuroendocrinologist Catherine Woolley found evidence of brain plasticity using a technique described in 1873?
- ... that an enclave of Edmonds, Washington, was formed after several failed attempts at annexing the community of Esperance?
- ... that Brennan's Criterion Bar in Bundoran, Ireland, had no television, discouraged live music, and banned swearing?
In the news
On this day