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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>Holy horseradish! Ancient roots of pain</title>
		<link>http://whyfiles.org/2010/holy-horseradish-ancient-roots-of-pain/</link>
		<comments>http://whyfiles.org/2010/holy-horseradish-ancient-roots-of-pain/#comments</comments>
		<pubDate>Thu, 18 Mar 2010 12:51:25 +0000</pubDate>
		<dc:creator>svmedaristwf</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[Structure and function in living systems]]></category>
		<category><![CDATA[This Week]]></category>
		<category><![CDATA[Wacky science]]></category>
		<category><![CDATA[caffeine]]></category>
		<category><![CDATA[chemical receptor]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[fruitfly]]></category>
		<category><![CDATA[genetics]]></category>
		<category><![CDATA[invertebrate]]></category>
		<category><![CDATA[pain]]></category>
		<category><![CDATA[taste sensation]]></category>
		<category><![CDATA[toxic chemicals]]></category>
		<category><![CDATA[TRPA1]]></category>
		<category><![CDATA[vertebrate]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=5745</guid>
		<description><![CDATA[Horseradish, onions and caffeine all activate a group of chemical receptors that can trigger a pain signal. Turns out the same receptors exist in fruitflies, mussels, corals and mule deer. Why has this receptor survived a half-billion years? Because it protects against toxic chemicals - even if they taste good in small doses!]]></description>
		<wfw:commentRss>http://whyfiles.org/2010/holy-horseradish-ancient-roots-of-pain/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Tracking traveling toads</title>
		<link>http://whyfiles.org/2010/tracking-traveling-toads/</link>
		<comments>http://whyfiles.org/2010/tracking-traveling-toads/#comments</comments>
		<pubDate>Thu, 04 Feb 2010 21:42:54 +0000</pubDate>
		<dc:creator>svmedaristwf</dc:creator>
				<category><![CDATA[All]]></category>
		<category><![CDATA[Bio brainstorms]]></category>
		<category><![CDATA[Biological Evolution]]></category>
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		<category><![CDATA[Reproduction and heredity]]></category>
		<category><![CDATA[Science as Inquiry]]></category>
		<category><![CDATA[Understanding about scientific inquiry]]></category>
		<category><![CDATA[adaptive radiation]]></category>
		<category><![CDATA[Australia]]></category>
		<category><![CDATA[bufo]]></category>
		<category><![CDATA[bufonidae]]></category>
		<category><![CDATA[cane toad]]></category>
		<category><![CDATA[colonization]]></category>
		<category><![CDATA[speciation]]></category>
		<category><![CDATA[toad]]></category>

		<guid isPermaLink="false">http://whyfiles.org/?p=4351</guid>
		<description><![CDATA[Do new species arise because so many niches are available in a new habitat? Or do they arise because newcomers have multiple talents for survival? A new study points to traits that enable success in the new location.]]></description>
		<wfw:commentRss>http://whyfiles.org/2010/tracking-traveling-toads/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<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>
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		<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[Genetic revolution]]></category>
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		<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>
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		<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>
		<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[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>
		<category><![CDATA[Biology]]></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[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[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[Grades 5-8]]></category>
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		<category><![CDATA[Life Science]]></category>
		<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>
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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[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>
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		<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>
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