Hi guys, most of you know the ethereum as the cryptocoin. Ok i understand you but the word ethereum is greek.
First the ancient greek thought that the world was built by fire, air, water , earth and ethereum.
After this opinion,
during the middle ages , the theory that all the world knew was the the empty between the planet was ethereum and also the ethereum was helping for the power transmission.
After the experiment of Michelson and Morley this opinion changed.