The History of Paper
How often do you write your notes on a piece of bamboo or silk? Probably quite seldom. But the fact is, before the invention of paper, the Chinese people used both bamboo and silk for that purpose. But since the bamboo was heavy and silk was expensive, the world was more than ready for a new alternative when paper officially was invented in 105 A.D.
Read more about the long and complex history of paper in this blogpost by Interesting Engineering.