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.
Jason Merritt/Getty Images. It's the end of an era. After 14 seasons, American Idol is coming to an end. Fox announced on Monday that the reality series will return, with judges Jennifer Lopez, Harry Connick Jr. and Keith Urban, as well as host Ryan Seacrest, for its 15th and final season in January.