| Global Networking Timeline: 30,000 BCE-999 CE (2873 words) |
 | 3500 BCE - [M] A 10,000 km strong network of long-distance trade routes spans the seas (a total of 1,000 km) and lands (a total of 9,000 km) of Eurasia and Africa (reanalysis of Sherratt 2003 data in Ciolek, forthcoming). |
| A second network (in addition to that established circa 4000 BCE in Mesopotamia), centered on north-eastern China, was established (Sherratt 2003). |
| Distant signalling stations would use torches to indicate the beginning and end of the transmission, as well as which of the many possible water levels was to be noted down and interpreted according to a given codebook (James and Thorpe 1994, cited in Chang et al. |
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