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	<title>The Why Files &#187; Physical Science</title>
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	<link>http://whyfiles.org</link>
	<description>The Science Behind The News</description>
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		<title>Nanotech</title>
		<link>http://whyfiles.org/2009/nanotech/</link>
		<comments>http://whyfiles.org/2009/nanotech/#comments</comments>
		<pubDate>Thu, 30 Jul 2009 22:27:05 +0000</pubDate>
		<dc:creator>admin</dc:creator>
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		<category><![CDATA[Grades 5-8]]></category>
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		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Properties in matter]]></category>
		<category><![CDATA[Structures and properties of matter]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[buckyball]]></category>
		<category><![CDATA[C.N. R. Rao]]></category>
		<category><![CDATA[composite material]]></category>
		<category><![CDATA[material science]]></category>
		<category><![CDATA[nanocarbon]]></category>
		<category><![CDATA[nanostructure]]></category>
		<category><![CDATA[nanotechnology]]></category>
		<category><![CDATA[nanotube]]></category>
		<category><![CDATA[plastic]]></category>
		<category><![CDATA[polymer]]></category>
		<category><![CDATA[strength]]></category>
		<category><![CDATA[synergy]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=2697</guid>
		<description><![CDATA[Adding nanotubes makes a stronger plastic, but adding several nano-structures greatly increases the benefit, according to a new study from India. Read about the frontier of material science.]]></description>
		<wfw:commentRss>http://whyfiles.org/2009/nanotech/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>North Korea&#8217;s nukes</title>
		<link>http://whyfiles.org/2009/north-koreas-nukes/</link>
		<comments>http://whyfiles.org/2009/north-koreas-nukes/#comments</comments>
		<pubDate>Thu, 11 Jun 2009 17:54:57 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Abilities necessary to do scientific inquiry]]></category>
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		<category><![CDATA[Human]]></category>
		<category><![CDATA[Natural and human-induced hazards]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Science and technology in society]]></category>
		<category><![CDATA[Science as Inquiry]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[War & peace]]></category>
		<category><![CDATA[atomic bomb]]></category>
		<category><![CDATA[beta particle]]></category>
		<category><![CDATA[comprehensive test ban]]></category>
		<category><![CDATA[gamma ray]]></category>
		<category><![CDATA[isotope analysis]]></category>
		<category><![CDATA[North Korea]]></category>
		<category><![CDATA[radiochemistry]]></category>
		<category><![CDATA[seismograph]]></category>
		<category><![CDATA[seismology]]></category>
		<category><![CDATA[seismometer]]></category>
		<category><![CDATA[underground nuclear tests]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=2342</guid>
		<description><![CDATA[Underground nuclear tests have been the biggest roadblock to a comprehensive test ban. How are these explosions detected, and how reliably?]]></description>
		<wfw:commentRss>http://whyfiles.org/2009/north-koreas-nukes/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Year of astronomy: More reasons to love stars!</title>
		<link>http://whyfiles.org/2009/year-of-astronomy-more-reasons-to-love-stars/</link>
		<comments>http://whyfiles.org/2009/year-of-astronomy-more-reasons-to-love-stars/#comments</comments>
		<pubDate>Sun, 25 Jan 2009 20:08:44 +0000</pubDate>
		<dc:creator>admin</dc:creator>
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		<category><![CDATA[Earth and Space Science]]></category>
		<category><![CDATA[Earth in the solar system]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Origin and evolution of the earth system]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Space & astronomy]]></category>
		<category><![CDATA[black hole]]></category>
		<category><![CDATA[early universe]]></category>
		<category><![CDATA[ice volcano]]></category>
		<category><![CDATA[Light pollution]]></category>
		<category><![CDATA[maser]]></category>
		<category><![CDATA[quasar]]></category>
		<category><![CDATA[Saturn]]></category>
		<category><![CDATA[Titan]]></category>
		<category><![CDATA[water]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1160</guid>
		<description><![CDATA[400 years ago, Galileo discovered the moons of Jupiter. We discover water from 11 billion years ago, volcanoes at Titan, a moon of Saturn, and good reasons to shun light pollution.]]></description>
		<wfw:commentRss>http://whyfiles.org/2009/year-of-astronomy-more-reasons-to-love-stars/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>New concern as ocean grows more acidic</title>
		<link>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/</link>
		<comments>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/#comments</comments>
		<pubDate>Thu, 13 Nov 2008 21:18:49 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[carbon dioxide]]></category>
		<category><![CDATA[dolphins]]></category>
		<category><![CDATA[fossil fuel pollution]]></category>
		<category><![CDATA[global warming]]></category>
		<category><![CDATA[greenhouse gas]]></category>
		<category><![CDATA[marine mammals]]></category>
		<category><![CDATA[noise]]></category>
		<category><![CDATA[ocean acidification]]></category>
		<category><![CDATA[ocean acidity]]></category>
		<category><![CDATA[sonar]]></category>
		<category><![CDATA[sound]]></category>
		<category><![CDATA[stranding]]></category>
		<category><![CDATA[whales]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1072</guid>
		<description><![CDATA[Each hour,  the ocean dissolves 1 million tons of carbon dioxide from burning fossil fuel. As the water grows more acidic, sound travels further. What will happen to marine mammals, which rely on an exquisite sense of hearing?]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/new-concern-as-ocean-grows-more-acidic/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Laser: The invention that just won&#8217;t quit!</title>
		<link>http://whyfiles.org/2008/laser-the-invention-that-just-wont-quit/</link>
		<comments>http://whyfiles.org/2008/laser-the-invention-that-just-wont-quit/#comments</comments>
		<pubDate>Thu, 17 Jul 2008 22:22:00 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Properties in matter]]></category>
		<category><![CDATA[Structures and properties of matter]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[chemical identification]]></category>
		<category><![CDATA[climate model]]></category>
		<category><![CDATA[eye surgery]]></category>
		<category><![CDATA[fiber-optic communications]]></category>
		<category><![CDATA[influenza virus structure]]></category>
		<category><![CDATA[laser applications]]></category>
		<category><![CDATA[laser history]]></category>
		<category><![CDATA[laser invention]]></category>
		<category><![CDATA[laser-assisted machining]]></category>
		<category><![CDATA[lasers]]></category>
		<category><![CDATA[lidar]]></category>
		<category><![CDATA[spectroscopy]]></category>
		<category><![CDATA[telecommunication]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1057</guid>
		<description><![CDATA[Lasers read and write CDs and DVDs, form the heart of fiber-optics, and are being used in climate prediction, chemical identification, high-tech manufacturing, even the battle against influenza.]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/laser-the-invention-that-just-wont-quit/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>The sounds of sax</title>
		<link>http://whyfiles.org/2008/the-sounds-of-sax/</link>
		<comments>http://whyfiles.org/2008/the-sounds-of-sax/#comments</comments>
		<pubDate>Thu, 07 Feb 2008 20:38:06 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Motions and forces]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[acoustic impedance]]></category>
		<category><![CDATA[altissimo]]></category>
		<category><![CDATA[amateur]]></category>
		<category><![CDATA[learning sax]]></category>
		<category><![CDATA[professional]]></category>
		<category><![CDATA[resonance]]></category>
		<category><![CDATA[sax]]></category>
		<category><![CDATA[saxophone]]></category>
		<category><![CDATA[throat]]></category>
		<category><![CDATA[vocal tract]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1036</guid>
		<description><![CDATA[New study shows that controlling throat shape helps pro players hit the high notes that elude amateurs.]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/the-sounds-of-sax/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Big ideas from the smallest world</title>
		<link>http://whyfiles.org/2008/big-ideas-from-the-smallest-world/</link>
		<comments>http://whyfiles.org/2008/big-ideas-from-the-smallest-world/#comments</comments>
		<pubDate>Thu, 31 Jan 2008 22:21:18 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Microworld]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Properties in matter]]></category>
		<category><![CDATA[Structures and properties of matter]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[abalone]]></category>
		<category><![CDATA[anti-reflective coating]]></category>
		<category><![CDATA[aragonite]]></category>
		<category><![CDATA[computer simulation]]></category>
		<category><![CDATA[fracture resistance]]></category>
		<category><![CDATA[material science]]></category>
		<category><![CDATA[mother-of-pearl]]></category>
		<category><![CDATA[nanotechnology]]></category>
		<category><![CDATA[nature design]]></category>
		<category><![CDATA[photonics]]></category>
		<category><![CDATA[snowfake]]></category>
		<category><![CDATA[snowflake generator]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1035</guid>
		<description><![CDATA[New snowflake generator reveals nature's design principles; anti-reflective coating is nearly perfect, and so is mother-of-pearl inside an abalone. Dive into the nitty gritty of the itty bitty!]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/big-ideas-from-the-smallest-world/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Ultimate Storm: What are hurricanes?</title>
		<link>http://whyfiles.org/2007/hurricane-science/</link>
		<comments>http://whyfiles.org/2007/hurricane-science/#comments</comments>
		<pubDate>Thu, 23 Aug 2007 21:40:03 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Atmospheric science]]></category>
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		<category><![CDATA[Earth & Space]]></category>
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		<category><![CDATA[Energy in the earth system]]></category>
		<category><![CDATA[Environment]]></category>
		<category><![CDATA[Grades 5-8]]></category>
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		<category><![CDATA[Natural]]></category>
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		<category><![CDATA[Natural hazards]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[TAP]]></category>
		<category><![CDATA[Weather & Climate]]></category>
		<category><![CDATA[hurricane]]></category>
		<category><![CDATA[intensity]]></category>
		<category><![CDATA[prediction]]></category>
		<category><![CDATA[tropical cyclone]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=592</guid>
		<description><![CDATA[How do they form? How do we predict their paths? How can we improve predictions?]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/hurricane-science/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Universe: Measured by New Yardstick</title>
		<link>http://whyfiles.org/2006/new-yardstick-for-the-universe/</link>
		<comments>http://whyfiles.org/2006/new-yardstick-for-the-universe/#comments</comments>
		<pubDate>Thu, 10 Aug 2006 17:00:35 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[History and Nature of Science]]></category>
		<category><![CDATA[Nature of science]]></category>
		<category><![CDATA[Nature of scientific knowledge]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Space & astronomy]]></category>
		<category><![CDATA[age of universe]]></category>
		<category><![CDATA[Hubble constant]]></category>
		<category><![CDATA[Keck Telescope]]></category>
		<category><![CDATA[M33]]></category>
		<category><![CDATA[size of universe]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=909</guid>
		<description><![CDATA[Feeling cramped? New measurement says the universe is bigger than you thought. Meet the astronomers' new yardstick.]]></description>
		<wfw:commentRss>http://whyfiles.org/2006/new-yardstick-for-the-universe/feed/</wfw:commentRss>
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		<item>
		<title>NASA to Earth Science: Take the Back Seat!</title>
		<link>http://whyfiles.org/2006/nasa-to-earth-science-take-the-back-seat/</link>
		<comments>http://whyfiles.org/2006/nasa-to-earth-science-take-the-back-seat/#comments</comments>
		<pubDate>Thu, 03 Aug 2006 21:12:52 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Environment & pollution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
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		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Science as Inquiry]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Understanding about scientific inquiry]]></category>
		<category><![CDATA[climate]]></category>
		<category><![CDATA[commitment]]></category>
		<category><![CDATA[earth scientists]]></category>
		<category><![CDATA[global change]]></category>
		<category><![CDATA[global warming]]></category>
		<category><![CDATA[hurricane]]></category>
		<category><![CDATA[long-term monitoring]]></category>
		<category><![CDATA[mission statement; earth science]]></category>
		<category><![CDATA[NASA]]></category>
		<category><![CDATA[ocean]]></category>
		<category><![CDATA[photosynthesis]]></category>
		<category><![CDATA[understand and protect home planet]]></category>
		<category><![CDATA[weather]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=907</guid>
		<description><![CDATA[To understand and protect the home planet: it's no longer a key NASA mission. What will we lose as NASA turns its eyes toward the moon and Mars?]]></description>
		<wfw:commentRss>http://whyfiles.org/2006/nasa-to-earth-science-take-the-back-seat/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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