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Periodic table...pretty cool!
http://www.pbslearningmedia.org/resource/phy03.sci.phys.matter.ptable/periodic-table-of-the-elements/?utm_source=facebook&utm_medium=social&utm_campaign=mktg2015 -
Water use after WV train derailment
http://www.cnn.com/2015/02/17/us/west-virginia-train-derailment/index.html
Last Modified on September 17, 2015
