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	<title>The Why Files &#187; Earth&#8217;s history</title>
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	<description>The Science Behind The News</description>
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		<title>Diamonds, Chocolate, Mating</title>
		<link>http://whyfiles.org/2002/diamonds-chocolate-mating/</link>
		<comments>http://whyfiles.org/2002/diamonds-chocolate-mating/#comments</comments>
		<pubDate>Thu, 07 Feb 2002 18:46:47 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Behavior of organisms]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biology]]></category>
		<category><![CDATA[By Subject]]></category>
		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Earth & Space]]></category>
		<category><![CDATA[Earth and Space Science]]></category>
		<category><![CDATA[Earth science]]></category>
		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Food]]></category>
		<category><![CDATA[Genetic revolution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Health]]></category>
		<category><![CDATA[Life science]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Origin and evolution of the earth system]]></category>
		<category><![CDATA[Personal and community health]]></category>
		<category><![CDATA[Personal health]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[atherosclerosis]]></category>
		<category><![CDATA[bird mating]]></category>
		<category><![CDATA[Canada]]></category>
		<category><![CDATA[chocolate]]></category>
		<category><![CDATA[diamond]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[female choice]]></category>
		<category><![CDATA[Gail Patricelli]]></category>
		<category><![CDATA[Penny Kris-Etherton]]></category>
		<category><![CDATA[Valentine's Day]]></category>

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		<description><![CDATA[Diamonds, mating and chocolate: three necessities of Valentine's Day.]]></description>
			<content:encoded><![CDATA[Diamonds, mating and chocolate: three necessities of Valentine's Day.]]></content:encoded>
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		<title>Global Warming: Old Records, New Evidence</title>
		<link>http://whyfiles.org/2001/global-warming-new-evidence-from-old-records/</link>
		<comments>http://whyfiles.org/2001/global-warming-new-evidence-from-old-records/#comments</comments>
		<pubDate>Tue, 11 Sep 2001 15:04:50 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[By Subject]]></category>
		<category><![CDATA[Earth & Space]]></category>
		<category><![CDATA[Earth and Space Science]]></category>
		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Environment]]></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[Science as Inquiry]]></category>
		<category><![CDATA[Understanding about scientific inquiry]]></category>
		<category><![CDATA[climate change]]></category>
		<category><![CDATA[climate climatology]]></category>
		<category><![CDATA[global warming climate change]]></category>
		<category><![CDATA[ice record]]></category>
		<category><![CDATA[John Magnuson]]></category>
		<category><![CDATA[lake ice record]]></category>
		<category><![CDATA[limnology]]></category>
		<category><![CDATA[paleoclimate paleoclimatology]]></category>
		<category><![CDATA[University of Wisconsin Madison UW-Madison]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=590</guid>
		<description><![CDATA[New evidence from records of lake ice freezing and thawing is evidence for global warming.]]></description>
			<content:encoded><![CDATA[New evidence from records of lake ice freezing and thawing is evidence for global warming.]]></content:encoded>
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		<title>Isotopes in Archeology &amp; Biology</title>
		<link>http://whyfiles.org/1999/isotopic-astonishment/</link>
		<comments>http://whyfiles.org/1999/isotopic-astonishment/#comments</comments>
		<pubDate>Wed, 24 Mar 1999 20:45:32 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Earth's history]]></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[Paleontology & archeology]]></category>
		<category><![CDATA[Science and Technology]]></category>
		<category><![CDATA[Science history & process]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[Understandings about science and technology]]></category>
		<category><![CDATA[archeology archaeology]]></category>
		<category><![CDATA[David Gibo]]></category>
		<category><![CDATA[isotope]]></category>
		<category><![CDATA[Leonard Wassenaarr]]></category>
		<category><![CDATA[Lincoln Brower]]></category>
		<category><![CDATA[Margaret Schoeninger]]></category>
		<category><![CDATA[Matthew Sponheimer]]></category>
		<category><![CDATA[migrate migration]]></category>
		<category><![CDATA[monarch butterfly]]></category>
		<category><![CDATA[Orley Taylor]]></category>
		<category><![CDATA[University of Wisconsin Madison UW-Madison]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=796</guid>
		<description><![CDATA[Isotope analysis help track monarch butterfly migration; also used for dating specimens in anthropology and biology.]]></description>
			<content:encoded><![CDATA[Isotope analysis help track monarch butterfly migration; also used for dating specimens in anthropology and biology.]]></content:encoded>
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		<title>Killer Asteroids: Ultimate Impact</title>
		<link>http://whyfiles.org/1998/ultimate-impact/</link>
		<comments>http://whyfiles.org/1998/ultimate-impact/#comments</comments>
		<pubDate>Wed, 04 Nov 1998 19:14:13 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Earth in the solar system]]></category>
		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Motions and forces]]></category>
		<category><![CDATA[Natural]]></category>
		<category><![CDATA[Natural and human-induced hazards]]></category>
		<category><![CDATA[Natural hazards]]></category>
		<category><![CDATA[Origin and evolution of the universe]]></category>
		<category><![CDATA[Physical Science]]></category>
		<category><![CDATA[Science in Personal and Social Perspectives]]></category>
		<category><![CDATA[Space astronomy]]></category>
		<category><![CDATA[Alan Harris]]></category>
		<category><![CDATA[Alessandro Morbidelli]]></category>
		<category><![CDATA[asteroid]]></category>
		<category><![CDATA[comet]]></category>
		<category><![CDATA[David Lien]]></category>
		<category><![CDATA[Donald Yeomans]]></category>
		<category><![CDATA[extinction]]></category>
		<category><![CDATA[Faith Vilas]]></category>
		<category><![CDATA[near-Earth objects]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=740</guid>
		<description><![CDATA[New searches are finding lots of asteroids. None of them are aimed at us -- yet. How much damage have asteroids done in the past?]]></description>
			<content:encoded><![CDATA[New searches are finding lots of asteroids. None of them are aimed at us -- yet. How much damage have asteroids done in the past?]]></content:encoded>
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		<title>Polar Science</title>
		<link>http://whyfiles.org/1998/polar-science/</link>
		<comments>http://whyfiles.org/1998/polar-science/#comments</comments>
		<pubDate>Sat, 04 Apr 1998 16:18:38 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
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		<category><![CDATA[CAP]]></category>
		<category><![CDATA[Earth & Space]]></category>
		<category><![CDATA[Earth and Space Science]]></category>
		<category><![CDATA[Earth science]]></category>
		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Energy in the earth system]]></category>
		<category><![CDATA[Environment]]></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[Weather & Climate]]></category>
		<category><![CDATA[Allen McCartney]]></category>
		<category><![CDATA[Antarctic Antarctica]]></category>
		<category><![CDATA[Arctic]]></category>
		<category><![CDATA[Michael Ledbetter]]></category>
		<category><![CDATA[Randall Davis]]></category>
		<category><![CDATA[Scott Elias]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=597</guid>
		<description><![CDATA[What's new in polar science? What do seals do under the ice? How did humans cross the Bering Strait to reach North America? What does ancient metal tell us about ancient people?]]></description>
			<content:encoded><![CDATA[What's new in polar science? What do seals do under the ice? How did humans cross the Bering Strait to reach North America? What does ancient metal tell us about ancient people?]]></content:encoded>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Dinos 4 Sale! (A Good Idea?)</title>
		<link>http://whyfiles.org/1996/dinos-4-sale/</link>
		<comments>http://whyfiles.org/1996/dinos-4-sale/#comments</comments>
		<pubDate>Thu, 05 Dec 1996 18:49:21 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biology]]></category>
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		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[History and Nature of Science]]></category>
		<category><![CDATA[Paleontology & archeology]]></category>
		<category><![CDATA[Science as a human endeavor]]></category>
		<category><![CDATA[Social Science]]></category>
		<category><![CDATA[Black Hills Institute of Geological Research]]></category>
		<category><![CDATA[David Fastovsky]]></category>
		<category><![CDATA[dinosaur]]></category>
		<category><![CDATA[fossil]]></category>
		<category><![CDATA[fossil ownership]]></category>
		<category><![CDATA[Klaus Westphal]]></category>
		<category><![CDATA[Marion Zenker]]></category>
		<category><![CDATA[Michael Woodburne]]></category>
		<category><![CDATA[paleontology]]></category>
		<category><![CDATA[Peter Larson]]></category>
		<category><![CDATA[Peter Sheehan]]></category>
		<category><![CDATA[Richard Stucky]]></category>
		<category><![CDATA[Sue dinosaur]]></category>
		<category><![CDATA[Tyrannosaurus rex]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=521</guid>
		<description><![CDATA[Tyrannosaurus Sue, raised questions about who owns dinosaur fossils. Should they jut go to the highest bidder, or should they have special status as scientific objects?]]></description>
			<content:encoded><![CDATA[Tyrannosaurus Sue, raised questions about who owns dinosaur fossils. Should they jut go to the highest bidder, or should they have special status as scientific objects?]]></content:encoded>
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		</item>
		<item>
		<title>Amber: The Natural Preservative</title>
		<link>http://whyfiles.org/1996/amber/</link>
		<comments>http://whyfiles.org/1996/amber/#comments</comments>
		<pubDate>Tue, 27 Feb 1996 14:30:39 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
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		<category><![CDATA[Earth's history]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[History and Nature of Science]]></category>
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		<category><![CDATA[Nature of scientific knowledge]]></category>
		<category><![CDATA[Paleontology & archeology]]></category>
		<category><![CDATA[Understandings about science and technology]]></category>
		<category><![CDATA[amber]]></category>
		<category><![CDATA[ancient bacteria]]></category>
		<category><![CDATA[ancient insect]]></category>
		<category><![CDATA[archeology archaeology]]></category>
		<category><![CDATA[Baltic amber]]></category>
		<category><![CDATA[Jean Langenheim]]></category>
		<category><![CDATA[paleontology]]></category>
		<category><![CDATA[Raul Cano]]></category>
		<category><![CDATA[Rob DeSalle]]></category>
		<category><![CDATA[tree]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=501</guid>
		<description><![CDATA[How amber is used in archeology and paleontology: Reviving ancient bacteria, viewing ancient insects, what's not to love about amber?]]></description>
			<content:encoded><![CDATA[How amber is used in archeology and paleontology: Reviving ancient bacteria, viewing ancient insects, what's not to love about amber?]]></content:encoded>
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