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  William Gilbert, after studying Greek amber experiments, coins the word electricity
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  This experiment was done because he hypothesized that lightning was electricty
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  He made an electric current travel through brine soaked cloth due to metal inside of it.
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  Lester Pelton made the first water mill by using a turbine and 2 buckets
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  Thomas Edison was not the first to think of harnessing electricities light properties he was merely the first to accomplish it
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  Professor James Blyth makes the first windmill made to produce electricity
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  Hertz discoverede energy waves and how to measure them, and now you measure waves in Hertz
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  Greeks discover electricity by rubbing amber against straw
I don't know how to set the date to 600BC - 
  
  The father of solar energy, Russel Ohl, invented the solar cell making it possible to harvest energy from the sun.
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  As of 2008 Hydropower is the most used alternative energy resource followed by solar and wind power respectively