Sapiens.
(A Brief History Of Humankind) Many cultures believedthat lightning was the hammer of an angry god,used to punish sinners. In the middle of the eighteenth century,in one of the most celebrated experiments in scienctific history, Benjamin Franklin flew a kite during alightning storm to test the hypothesis that lightning is simply an electric current. Franklins empirical observations,coupled with his knowledgeabout the qualities ofelectrical energy, enabled himto invent the lightning rod and disarmed the gods. Written by Yuval Noah Harari. Today we live in aperiod of science and technology and can't imagine about such a thing. We should be thankful for every thing we use in our daily life . Thanks and good by.