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	<title>The Why Files &#187; Biological Evolution</title>
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	<link>http://whyfiles.org</link>
	<description>The Science Behind The News</description>
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		<title>How a fly detects a poison</title>
		<link>http://whyfiles.org/2009/how-a-fly-detects-a-poison/</link>
		<comments>http://whyfiles.org/2009/how-a-fly-detects-a-poison/#comments</comments>
		<pubDate>Thu, 02 Jul 2009 21:44:34 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
		<category><![CDATA[By Subject]]></category>
		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Regulation and behavior]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[Food]]></category>
		<category><![CDATA[fruit fly]]></category>
		<category><![CDATA[glutamate]]></category>
		<category><![CDATA[taste]]></category>
		<category><![CDATA[taste receptor]]></category>
		<category><![CDATA[toxic chemicals]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=2654</guid>
		<description><![CDATA[Animals spend a lot of energy avoiding toxic chemicals in their food. A new type of gene that does this in fruit flies reinforces the importance of reproduction in shaping evolution.]]></description>
		<wfw:commentRss>http://whyfiles.org/2009/how-a-fly-detects-a-poison/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Celebrating Darwin and evolution</title>
		<link>http://whyfiles.org/2009/celebrating-darwin-and-evolution/</link>
		<comments>http://whyfiles.org/2009/celebrating-darwin-and-evolution/#comments</comments>
		<pubDate>Fri, 06 Feb 2009 01:38:52 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
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		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Genetic revolution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[In The News]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[Science history & process]]></category>
		<category><![CDATA[Charles Darwin birthday]]></category>
		<category><![CDATA[dung beetles]]></category>
		<category><![CDATA[evolving trilobites]]></category>
		<category><![CDATA[evolving whales]]></category>
		<category><![CDATA[proofs for evolution]]></category>
		<category><![CDATA[silent crickets]]></category>
		<category><![CDATA[theory of evolution through natural selection]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1514</guid>
		<description><![CDATA[The theory of evolution is 150 years old, but forever young. We examine proofs for evolution, and four cool studies showing just how correct Charles Darwin was. Want to talk about silent crickets?]]></description>
		<wfw:commentRss>http://whyfiles.org/2009/celebrating-darwin-and-evolution/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Fish prove: The eyes have it!</title>
		<link>http://whyfiles.org/2008/fish-prove-the-eyes-have-it/</link>
		<comments>http://whyfiles.org/2008/fish-prove-the-eyes-have-it/#comments</comments>
		<pubDate>Thu, 02 Oct 2008 20:50:33 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
		<category><![CDATA[By Subject]]></category>
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		<category><![CDATA[Grades 5-8]]></category>
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		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Plants & animals]]></category>
		<category><![CDATA[Populations and ecosystems]]></category>
		<category><![CDATA[adaptive radiation]]></category>
		<category><![CDATA[cichlid evolution]]></category>
		<category><![CDATA[cichlid fish]]></category>
		<category><![CDATA[evolutionary biology]]></category>
		<category><![CDATA[fin color]]></category>
		<category><![CDATA[fish genetics]]></category>
		<category><![CDATA[fish vision]]></category>
		<category><![CDATA[geographic barriers]]></category>
		<category><![CDATA[Lake Victoria]]></category>
		<category><![CDATA[sensory hypothesis of speciation]]></category>
		<category><![CDATA[water quality]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1066</guid>
		<description><![CDATA[The color, vision and genetics of an African fish all vary depending on the clarity of its home waters.  A new study suggests how species can form without geographic barriers.]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/fish-prove-the-eyes-have-it/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Caterpillar camouflage</title>
		<link>http://whyfiles.org/2008/caterpillar-camouflage/</link>
		<comments>http://whyfiles.org/2008/caterpillar-camouflage/#comments</comments>
		<pubDate>Fri, 22 Feb 2008 03:24:45 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Structure and function in living systems]]></category>
		<category><![CDATA[bird dung]]></category>
		<category><![CDATA[camouflage]]></category>
		<category><![CDATA[instar]]></category>
		<category><![CDATA[juvenile hormone]]></category>
		<category><![CDATA[leaf mimicry]]></category>
		<category><![CDATA[swallowtail butterfly caterpillar larva]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1038</guid>
		<description><![CDATA[Presto-chango! Caterpillar larva looks like a bird dung -- and then like a leaf. New study points a finger at hormonal balance...]]></description>
		<wfw:commentRss>http://whyfiles.org/2008/caterpillar-camouflage/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Nobel goes to gene-knockouts.</title>
		<link>http://whyfiles.org/2007/nobel-goes-to-gene-knockouts/</link>
		<comments>http://whyfiles.org/2007/nobel-goes-to-gene-knockouts/#comments</comments>
		<pubDate>Thu, 18 Oct 2007 20:31:44 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
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		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Genetic revolution]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[2007 Nobel for medicine and physiology]]></category>
		<category><![CDATA[being used for research into cancer]]></category>
		<category><![CDATA[genetic targeting]]></category>
		<category><![CDATA[genetics]]></category>
		<category><![CDATA[heart disease]]></category>
		<category><![CDATA[knock-in mouse]]></category>
		<category><![CDATA[Knockout mouse]]></category>
		<category><![CDATA[manipulation of genes]]></category>
		<category><![CDATA[Mario Capecchi]]></category>
		<category><![CDATA[Martin Evans]]></category>
		<category><![CDATA[medicine]]></category>
		<category><![CDATA[Obesity]]></category>
		<category><![CDATA[Oliver Smithies]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1021</guid>
		<description><![CDATA[A technology that revolutionized medicine and genetics gets the big Nobelian Nod. Cancer. Heart disease. Obesity. Research into virtually every major disease has gotten a boost from the Knockout Nobel!]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/nobel-goes-to-gene-knockouts/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Breeding dogs, breeding other animals</title>
		<link>http://whyfiles.org/2007/breeding-dogs-breeding-other-animals/</link>
		<comments>http://whyfiles.org/2007/breeding-dogs-breeding-other-animals/#comments</comments>
		<pubDate>Thu, 09 Aug 2007 20:04:52 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[Plants & animals]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[animal breeding]]></category>
		<category><![CDATA[cattle]]></category>
		<category><![CDATA[chicken]]></category>
		<category><![CDATA[cow]]></category>
		<category><![CDATA[dog]]></category>
		<category><![CDATA[dog-fighting]]></category>
		<category><![CDATA[farming]]></category>
		<category><![CDATA[genetics]]></category>
		<category><![CDATA[Michael Vick]]></category>
		<category><![CDATA[pit bull]]></category>
		<category><![CDATA[wild relatives]]></category>
		<category><![CDATA[wolf]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1009</guid>
		<description><![CDATA[Football star convicted for bloody dog-fighting operation. What made the wolf turn into 400+ breeds of dog? How have farmers and animal breeders changed cattle and chickens? Why bother saving an old breed of horse?]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/breeding-dogs-breeding-other-animals/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Polyandry: Bees do it. What&#8217;s the big advantage?</title>
		<link>http://whyfiles.org/2007/polyandry-bees-do-it-whats-the-big-advantage/</link>
		<comments>http://whyfiles.org/2007/polyandry-bees-do-it-whats-the-big-advantage/#comments</comments>
		<pubDate>Thu, 19 Jul 2007 21:08:56 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
		<category><![CDATA[By Subject]]></category>
		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Plants & animals]]></category>
		<category><![CDATA[Populations and ecosystems]]></category>
		<category><![CDATA[colony survival]]></category>
		<category><![CDATA[drones]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[genetic diversity]]></category>
		<category><![CDATA[genetic fitness]]></category>
		<category><![CDATA[honeybee]]></category>
		<category><![CDATA[males]]></category>
		<category><![CDATA[mate]]></category>
		<category><![CDATA[queen]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=1005</guid>
		<description><![CDATA[A honeybee queen mates with 15 guys. This weakens family ties in the hive, possibly hampering the selfless behavior these bees need for survival.  Does polyandry have hidden benefits for bees?]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/polyandry-bees-do-it-whats-the-big-advantage/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Ancient, gliding reptile discovered</title>
		<link>http://whyfiles.org/2007/ancient-gliding-reptile-discovered/</link>
		<comments>http://whyfiles.org/2007/ancient-gliding-reptile-discovered/#comments</comments>
		<pubDate>Thu, 21 Jun 2007 23:35:47 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
		<category><![CDATA[Biology]]></category>
		<category><![CDATA[By Subject]]></category>
		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Paleontology & archeology]]></category>
		<category><![CDATA[Structure and function in living systems]]></category>
		<category><![CDATA[CT scanner]]></category>
		<category><![CDATA[fossil]]></category>
		<category><![CDATA[Mecistotrachelos apeoros]]></category>
		<category><![CDATA[paleontology]]></category>
		<category><![CDATA[reptile]]></category>
		<category><![CDATA[tetrapod glider]]></category>
		<category><![CDATA[Triassic]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=998</guid>
		<description><![CDATA[220-million-year-old rock reveals four-legged reptile with wings. Fossils could not be removed, so the images came from CT scanner.]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/ancient-gliding-reptile-discovered/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Biodiversity: Species Form Faster Near Poles</title>
		<link>http://whyfiles.org/2007/biodiversity-species-form-faster-near-poles/</link>
		<comments>http://whyfiles.org/2007/biodiversity-species-form-faster-near-poles/#comments</comments>
		<pubDate>Thu, 15 Mar 2007 20:28:25 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[By Theme]]></category>
		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Plants & animals]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[bird]]></category>
		<category><![CDATA[divergence]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[extinction]]></category>
		<category><![CDATA[mammal]]></category>
		<category><![CDATA[poles]]></category>
		<category><![CDATA[speciation]]></category>
		<category><![CDATA[tropics]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=977</guid>
		<description><![CDATA[Conventional wisdom says species form faster in the biodiverse tropics. But a new study shows fast speciation and extinction at the poles. Why didn&#8217;t we think up this study?
]]></description>
		<wfw:commentRss>http://whyfiles.org/2007/biodiversity-species-form-faster-near-poles/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Size of Sperm: Is Bigger Better?</title>
		<link>http://whyfiles.org/2006/the-size-of-the-sperm-is-bigger-better/</link>
		<comments>http://whyfiles.org/2006/the-size-of-the-sperm-is-bigger-better/#comments</comments>
		<pubDate>Thu, 06 Jul 2006 21:55:03 +0000</pubDate>
		<dc:creator>schulte</dc:creator>
				<category><![CDATA[All]]></category>
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		<category><![CDATA[Grades 5-8]]></category>
		<category><![CDATA[Grades 9-12]]></category>
		<category><![CDATA[Life Science]]></category>
		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[Social Science]]></category>
		<category><![CDATA[Wacky science]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[evolution of sex]]></category>
		<category><![CDATA[gametes]]></category>
		<category><![CDATA[giant sperm]]></category>
		<category><![CDATA[sexual selection]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=901</guid>
		<description><![CDATA[Evolution favors tiny sperm, which boost a guys chance of fertilizing an egg. So why do some fruit flies make giant sperm? ]]></description>
		<wfw:commentRss>http://whyfiles.org/2006/the-size-of-the-sperm-is-bigger-better/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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