A History of Cannabis

Chapter 2:

Professors Tengwen Long and Pavel Tarasov's theories aside (see Chapter 1), the earliest known use of cannabis for its medicinal properties can be traced back to ancient China some 5,000 years ago. However, it is not always easy to establish accurate dates for specific events as the Chinese did not excel exactly at writing them down. In some cases, we know the periods when some of these events happened only by references made to or by emperors...

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