The Technology of the Song Dynasty (960–1279 AD) was advanced, providing some of the most prolific technological advancements in Chinese history, much of which came from talented statesmen drafted by the government through imperial examinations. The ingenuity of mechanical engineering had a long tradition in China. The Song Dynasty engineer Su Song admitted that he and his contemporaries were building upon the achievements of the ancients such as Zhang Heng, an astronomer, inventor, and early master of mechanical gears. The application of movable type printing advanced the already widespread use of woodblock printing to educate and amuse Confucian students and the masses. The application of new weapons employing the use of gunpowder enabled the Song Dynasty to ward off its militant enemies until its collapse to the Mongol forces of Kublai Khan, in the late 13th century. Notable advancements in civil engineering, nautics, and metallurgy were made in Song China, as well as the introduction of the windmill to China during the 13th century. These advancements, along with the introduction of paper-printed money, helped revolutionize and sustain the economy of the Song Dynasty. (more...)
Marie Curie (1867–1934) was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity. Born in Warsaw, she studied in Poland until she was 24, when she moved to Paris to earn her higher degrees. In 1895, she married French physicist Pierre Curie, and in 1903 she shared the Nobel Prize in Physics with Pierre and physicist Henri Becquerel for their pioneering work developing the theory of "radioactivity" – a term she coined. She was the first woman to win a Nobel Prize. She won a second Nobel Prize in 1911, the first person to do so, for her discovery of the elements polonium and radium. Under her direction, the world's first studies were conducted into the treatment of neoplasms by the use of radioactive isotopes. During World War I, she developed mobile radiography units to provide X-ray services to field hospitals. She founded the Curie Institute in Paris in 1920, and the Curie Institute in Warsaw in 1932. This photograph of Curie was taken in around 1920 by French photographer Henri Manuel.
Community portal – The central hub for editors, with resources, links, tasks, and announcements.
Village pump – Forum for discussions about Wikipedia itself, including policies and technical issues.
Site news – Sources of news about Wikipedia and the broader Wikimedia movement.
Teahouse – Ask basic questions about using or editing Wikipedia.
Help desk – Ask questions about using or editing Wikipedia.
Reference desk – Ask research questions about encyclopedic topics.
Content portals – A unique way to navigate the encyclopedia.
Wikipedia's sister projects
Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects:
.jpg)
Commons
MediaWiki
Meta-Wiki
Wikibooks
Wikidata
Wikinews
Wikiquote
Wikisource
Wikispecies
Wikiversity
Wikivoyage
Wiktionary
