Communication
Chinese at Jiahu (Henan Province) carve symbols into tortoise shells, which are then left in graves. According to Garman Harbottle of the State University of New York at Stony Brook, the symbols are precursors of Chinese ideographic writing. If so, this is the earliest form of writing known.
ConstructionThe oldest wall known is built in Jericho (West Bank) from boulders set in place without mortar. It is more than 3.6 m (12 ft) high and is 2 m (6 ft 6 in.) thick at the base. See also 4200 bce Construction.
People living in Jericho known as the Pre-Pottery Neolithic build dome-shaped houses from sun-baked brick that is formed entirely by hand (without molds). See also 10,000 bce Construction; 7000 bce Construction. (See essay.)
Tell Mureybit (Syria) contains stone houses, although the villagers are hunters, not farmers. See also 10,000 bce Construction; 4500 bce Construction.
Food & agriculturePotatoes are domesticated in the Andean Highlands (Peru). See also 8750 bce Food & agriculture; 7400 bce Food & agriculture.
The banana and the taro root are domesticated in the highlands of New Guinea.
Beer is brewed in Mesopotamia. See also 6000 bce Food & agriculture.
Floodwater agriculture is used in the Nile valley and in southwestern Asia. See also 6000 bce Food & agriculture.
MaterialsAlthough it is impossible to be certain, it appears that copper is used occasionally by this time; it is worked like a soft stone, not cast. See also 6400 bce Materials.
MathematicsThe first forms of fired clay tokens are being used by Neolithic people to record the products of farming, such as jars of oil and measures of grain, at sites in what are now Syria and Iran. Tokens are believed to have evolved into the separate ideas of number and written word over the next 5000 years. At a few sites tokens continue to be used until about 1500 bce.




