Around 4000 years ago, an invention swept across Asia from somewhere in Tibet or Burma (modern-day Myanmar) that revolutionized communications technology forever. By 600 AD in western China, it had reduced communication latency from days to minutes and relayed important information across hundreds of miles, from one locality to another as many as 50 miles apart. Without telephones, radio waves or fiberoptic cables, this extremely efficient information delivery system warned of invasion, declared governmental edicts, announced royal births, and the coronation of emperors. It is said that some devices could influence the weather and bring about rain in times of drought; even engender healing in the human body.