Gout causes a painful, swollen joint that's so severe that the weight of bed sheets can cause distress. There may also be more than one joint affected with gout. With gout, uric acid -- a normal chemical in the body -- forms crystals that deposit in the joints, causing inflammation and pain.
China has been the source of many innovations, scientific discoveries and inventions. This includes the Four Great Inventions: papermaking, the compass, gunpowder, and printing (both woodblock and movable type). The list below contains these and other inventions in China attested by archaeology or history.
Numerous developments were made during this period in culture and mathematics, examples include an important literary achievement, the Zuo Commentary on the Spring and Autumn Annals, which summarizes the preceding Spring and Autumn period and the bundle of 21 bamboo slips from the Tsinghua collection, which was invented during this period dated to 305 BC, are the worlds' earliest example of a two digit decimal multiplication table, indicating that sophisticated commercial arithmetic was ...