Coal is formed when peat is altered physically and chemically. This process is called coalification.. During coalification, peat undergoes several changes as a result of bacterial decay, compaction, heat, and time.
On January 9, 2011, ABC Family announced the show would return for its fourth season on March 26, 2011. On February 2, 2012, ABC Family renewed the series for a fifth season. On October 9, 2012, it was announced that the fifth season of The Secret Life of the American Teenager would be the final season. The series finale aired on June 3, 2013.
Pretty Little Liars 7 Seasons 2016. In the seventh and most romantic season of hit drama series Pretty Little Liars, the PLLs band together to unearth answers to the last remaining secrets and take down Uber A for good. Andrea Parker joins the cast as a series regular this season, as Mary Drake, the identical twin of Alison's mother, Mrs. DiLaurentis.