900
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| Years: 896 897 898 899 - 900 - 901 902 903 904 | |
| Decades: 870s 880s 890s - 900s - 910s 920s 930s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Persian scientist, Rhazes, distinguished smallpox from measles in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintained "the conception of an 'absolute' time, regarded by him as a never-ending flow".
- Gyeonhwon formally establishes the kingdom of Hubaekje in southwestern Korea.
- Merchants from southwest Asia and India settle on the east-African coast, trading gold, beads and metal for ivory and slaves.
- Harold I of the Yngling or Scilfing dynasty subdues the petty kings of Norway and conquers the Orkney and Shetland islands.
Births
Deaths
- August 13 - Zwentibold, last King of Lotharingia (b. 870)
- Donald II, King of the Scots and Pictsaf:900
ast:900 bg:900 ca:900 cs:900 de:900 el:900 es:900 eo:900 eu:900 fr:900 gl:900 ko:900년 hr:900 io:900 it:900 la:900 lb:900 hu:900 nl:900 nb:900 nn:900 pl:900 pt:900 ro:900 ru:900 sk:900 sl:900 sr:900 fi:900 sv:900 tt:900 uk:900 zh:900年