Chronology of communication before electricity (idea) by legbagede - Everything2.com
Clip source: Chronology of communication before electricity (idea) by legbagede - Everything2.com Chronology of communication before electricity (idea)See all of Chronology of communication before electricity, no other writeups in this node. See also :Chronology of Communication after electronics to 1998, A Chronology of Communication from electricity to electronics, A Convoluted History of Early Telecommunications. c. 20,000 B.C.- Cave painting is widespread in Eurasia. Etchings are fig...