<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE article  PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "http://dtd.nlm.nih.gov/publishing/3.0/journalpublishing3.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="3.0" xml:lang="en" article-type="research article"><front><journal-meta><journal-id journal-id-type="publisher-id">AMPC</journal-id><journal-title-group><journal-title>Advances in Materials Physics and Chemistry</journal-title></journal-title-group><issn pub-type="epub">2162-531X</issn><publisher><publisher-name>Scientific Research Publishing</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.4236/ampc.2017.79027</article-id><article-id pub-id-type="publisher-id">AMPC-79058</article-id><article-categories><subj-group subj-group-type="heading"><subject>Letter to the Editor</subject></subj-group><subj-group subj-group-type="Discipline-v2"><subject>Chemistry&amp;Materials Science</subject><subject> Physics&amp;Mathematics</subject></subj-group></article-categories><title-group><article-title>
 
 
  Spacetime as a New Frontier Advanced Material with Applications in Physics, Engineering, Chemistry and Cosmology
 
</article-title></title-group><contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Mohamed</surname><given-names>S. El Naschie</given-names></name><xref ref-type="aff" rid="aff1"><sub>1</sub></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib></contrib-group><aff id="aff1"><label>1</label><addr-line>Department of Physics, Faculty of Science, University of Alexandria, Alexandria, Egypt</addr-line></aff><author-notes><corresp id="cor1">* E-mail:<email>Chaossf@aol.com</email></corresp></author-notes><pub-date pub-type="epub"><day>13</day><month>09</month><year>2017</year></pub-date><volume>07</volume><issue>09</issue><fpage>347</fpage><lpage>352</lpage><history><date date-type="received"><day>9,</day>	<month>August</month>	<year>2017</year></date><date date-type="rev-recd"><day>11,</day>	<month>September</month>	<year>2017</year>	</date><date date-type="accepted"><day>14,</day>	<month>September</month>	<year>2017</year></date></history><permissions><copyright-statement>&#169; Copyright  2014 by authors and Scientific Research Publishing Inc. </copyright-statement><copyright-year>2014</copyright-year><license><license-p>This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/</license-p></license></permissions><abstract><p>
 
 
  A Letter to the Editor.
 
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