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<channel>
	<title>Letters to Nature</title>
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	<link>http://letterstonature.wordpress.com</link>
	<description></description>
	<pubDate>Tue, 15 Jul 2008 16:24:21 +0000</pubDate>
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	<language>en</language>
			<item>
		<title>Big Bad Black Holes</title>
		<link>http://letterstonature.wordpress.com/2008/07/15/big-bad-black-holes/</link>
		<comments>http://letterstonature.wordpress.com/2008/07/15/big-bad-black-holes/#comments</comments>
		<pubDate>Tue, 15 Jul 2008 16:24:21 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Science and the Public]]></category>

		<category><![CDATA[The Universe]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=78</guid>
		<description><![CDATA[I was sitting with some fellow tourists on a three-day coach tour of Ireland yesterday when the topic of what I do for a living came up. After being briefly mistaken for an astrologer (I really should start charging money for my services), my mother-in-law Christine mentioned my interest in black holes.
(Aside: black holes are [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/07/15/big-bad-black-holes/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>
	</item>
		<item>
		<title>Green astronomy</title>
		<link>http://letterstonature.wordpress.com/2008/06/28/new-in-energy/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/28/new-in-energy/#comments</comments>
		<pubDate>Sat, 28 Jun 2008 19:33:11 +0000</pubDate>
		<dc:creator>Berian</dc:creator>
		
		<category><![CDATA[Physics]]></category>

		<category><![CDATA[Science]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=74</guid>
		<description><![CDATA[In matters relating to the Mother Star, Core77 point out a company claiming to build higher-efficiency solar collectors: instead of a flat photo-voltaic cell across the entire collection area, a small-but-more-apparently-more-efficient cell is placed at the focus of a curved mirror:
Now wait just a minute, there. Photons, check. Primary and secondary mirrors, check. CCD-analogue, check. [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/28/new-in-energy/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/berian-128.jpg" medium="image">
			<media:title type="html">Berian</media:title>
		</media:content>

		<media:content url="http://www.solfocus.com/userfiles/product01.jpg" medium="image">
			<media:title type="html">we reflect, you decide.</media:title>
		</media:content>
	</item>
		<item>
		<title>Pretty robust directions</title>
		<link>http://letterstonature.wordpress.com/2008/06/27/pretty-robust-directions/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/27/pretty-robust-directions/#comments</comments>
		<pubDate>Fri, 27 Jun 2008 20:57:42 +0000</pubDate>
		<dc:creator>Berian</dc:creator>
		
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=67</guid>
		<description><![CDATA[Another item in the pantheon of amusing tweaked Google results:


(ht: Andrew Sullivan)
       ]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/27/pretty-robust-directions/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/berian-128.jpg" medium="image">
			<media:title type="html">Berian</media:title>
		</media:content>

		<media:content url="http://letterstonature.files.wordpress.com/2008/06/kayak.png" medium="image">
			<media:title type="html">Fourty-one days is, however, ambitious.</media:title>
		</media:content>
	</item>
		<item>
		<title>It&#8217;s OK, Pluto &#8230;</title>
		<link>http://letterstonature.wordpress.com/2008/06/27/its-ok-pluto/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/27/its-ok-pluto/#comments</comments>
		<pubDate>Fri, 27 Jun 2008 12:34:27 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Science and the Public]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=64</guid>
		<description><![CDATA[It seems that the International Astronomical Union&#8217;s decision to re-classify the Planet Pluto has reached the ears of T-Shirt makers. Here&#8217;s a funny design from Snorg Tees:


That&#8217;s probably the funniest astronomy-related-T-shirt I&#8217;ve seen, but it doesn&#8217;t have much competition.
       ]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/27/its-ok-pluto/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>

		<media:content url="http://letterstonature.files.wordpress.com/2008/06/itsokaypluto_fullpic_1.gif?w=300" medium="image">
			<media:title type="html">It\'s OK, Pluto.</media:title>
		</media:content>
	</item>
		<item>
		<title>A Calendar Puzzle</title>
		<link>http://letterstonature.wordpress.com/2008/06/19/a-calendar-puzzle/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/19/a-calendar-puzzle/#comments</comments>
		<pubDate>Thu, 19 Jun 2008 21:09:42 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Mathematics]]></category>

		<category><![CDATA[Puzzle]]></category>

		<category><![CDATA[calendar]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=63</guid>
		<description><![CDATA[Here&#8217;s a nice, neat puzzle for those with a spare minute.
I was at a mate&#8217;s house and saw that he had a desk calendar that worked as follows. The day of the month was displayed using two cubes, which had one number on each face. A quick calculation would suggest that the first cube (the [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/19/a-calendar-puzzle/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>
	</item>
		<item>
		<title>Tetris Archaeology</title>
		<link>http://letterstonature.wordpress.com/2008/06/09/tetris-archaeology/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/09/tetris-archaeology/#comments</comments>
		<pubDate>Mon, 09 Jun 2008 14:58:04 +0000</pubDate>
		<dc:creator>brendonbrewer</dc:creator>
		
		<category><![CDATA[Statistics and Metrics]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=61</guid>
		<description><![CDATA[Recently, I was watching my cousin Ben play Tetris on his home computer. Being related to the Brewers, Ben has a somewhat obsessive personality, and playing Tetris had become a habit, something to do when there's nothing else to do. One day, while discussing Tetris, Ben mentioned that all of the high scores on their computer (shared between Ben and his brother Andrew) were between 18,000 and 21,000. "Wow", I said, "you guys must play tetris a lot".]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/09/tetris-archaeology/feed/</wfw:commentRss>
	
		<media:content url="http://web.maths.unsw.edu.au/~brewer/tetris.png" medium="image" />

		<media:content url="http://web.maths.unsw.edu.au/~brewer/gnometris.png" medium="image" />
	</item>
		<item>
		<title>The Imperfection of the Musical Scale (Part 2)</title>
		<link>http://letterstonature.wordpress.com/2008/06/08/the-imperfection-of-the-musical-scale-part-2/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/08/the-imperfection-of-the-musical-scale-part-2/#comments</comments>
		<pubDate>Sun, 08 Jun 2008 09:05:58 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=59</guid>
		<description><![CDATA[We saw from one of my  previous posts  that we can’t choose the notes of the musical scale such that, from every note, an interval of a perfect octave (ratio of 2:1) and a fifth (ratio of 3:2) is available. In this post, I will explain how this problem is fixed in the [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/08/the-imperfection-of-the-musical-scale-part-2/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>

		<media:content url="http://upload.wikimedia.org/math/e/3/f/e3f935995b9b326d158c19dece494491.png" medium="image">
			<media:title type="html">Continued Fraction</media:title>
		</media:content>
	</item>
		<item>
		<title>The weirdo&#8217;s have found us</title>
		<link>http://letterstonature.wordpress.com/2008/06/06/the-weirdos-have-found-us/</link>
		<comments>http://letterstonature.wordpress.com/2008/06/06/the-weirdos-have-found-us/#comments</comments>
		<pubDate>Fri, 06 Jun 2008 11:21:19 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Science and the Public]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=58</guid>
		<description><![CDATA[A while ago I posted on Joy Christian&#8217;s supposed disproof of Bell&#8217;s theorem, under the title &#8220;Did the universe just get less weird?&#8221; I was just looking through the statistics of how people find our blog. At some point today, someone stumbled onto my post by typing the following search into Google:
How to be less [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/06/06/the-weirdos-have-found-us/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>
	</item>
		<item>
		<title>The Imperfection of the Musical Scale (Part 1)</title>
		<link>http://letterstonature.wordpress.com/2008/05/23/the-imperfection-of-the-musical-scale-part-1/</link>
		<comments>http://letterstonature.wordpress.com/2008/05/23/the-imperfection-of-the-musical-scale-part-1/#comments</comments>
		<pubDate>Fri, 23 May 2008 21:24:21 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=57</guid>
		<description><![CDATA[The most surprising feature of the musical scale is its imperfection – we don’t get everything we could hope for. Allow me to explain.
The pitch of a musical note is related to its frequency, that is, the number of sound waves that pass a given point per second. Frequency is measured in hertz (Hz) – [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/05/23/the-imperfection-of-the-musical-scale-part-1/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>
	</item>
		<item>
		<title>Batting 106: How To Build A Routine</title>
		<link>http://letterstonature.wordpress.com/2008/04/18/batting-106-how-to-build-a-routine/</link>
		<comments>http://letterstonature.wordpress.com/2008/04/18/batting-106-how-to-build-a-routine/#comments</comments>
		<pubDate>Fri, 18 Apr 2008 19:55:21 +0000</pubDate>
		<dc:creator>lukebarnes</dc:creator>
		
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://letterstonature.wordpress.com/?p=55</guid>
		<description><![CDATA[This is the last post in my series Introduction to Batting in Cricket: Mechanics, Visual Strategy and Psychology.
We saw in my previous post that a major problem for batsmen is internal distractibility – at the critical moment, when the ball is released, unwanted thoughts drift into your head, reducing your reaction time and diverting your [...]]]></description>
		<wfw:commentRss>http://letterstonature.wordpress.com/2008/04/18/batting-106-how-to-build-a-routine/feed/</wfw:commentRss>
	
		<media:content url="http://a.wordpress.com/avatar/lukebarnes-128.jpg" medium="image">
			<media:title type="html">lukeb</media:title>
		</media:content>
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