PANEM - THE SEAM - 1 views
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ericalorraine on 03 Dec 14People have known about coal since ancient times. Aristotle, the Greek philosopher, wrote about it in one of his books - Meteorology - during the 4th Century B.C. By the 13th century, people in Europe were commonly using this natural resource. By the 14th century, Hopi Indians had discovered its value.