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	<title>Comments on: Paul Ehrlich describes how human culture evolved</title>
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	<link>http://earthsky.org/human-world/how-human-culture-evolved</link>
	<description>A Clear Voice for Science</description>
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		<title>By: Hank</title>
		<link>http://earthsky.org/human-world/how-human-culture-evolved/comment-page-1#comment-6176</link>
		<dc:creator>Hank</dc:creator>
		<pubDate>Sat, 06 Dec 2008 11:04:55 +0000</pubDate>
		<guid isPermaLink="false">http://208.96.63.114/?p=3736#comment-6176</guid>
		<description>	&lt;p&gt;Benjamin,&lt;/p&gt;

	&lt;p&gt;I found your comments to be intriguing. However, there are a number of problems that need to be overcome in order for your analysis to work.&lt;/p&gt;

	&lt;p&gt;1. The highly radioactive waste generated at Oklo was held in place by granite, sandstone, and clays surrounding the deep ground reaction sites. None of it made it to the surface to irradiate human ancestors. [Cowan, G. A. 1976. &#8220;A Natural Fission Reactor,&#8221; Scientific American, 235:36, pp39]&lt;/p&gt;

	&lt;p&gt;2. Humans have two less chromosomes as compared to apes. Most scientists favor a fusion of the #2 and #3 karyotypes of apes to form chromosome #2 (your conjoined chromosome) in humans as an explanation. Additionally the &lt;span class=&quot;caps&quot;&gt;DNA&lt;/span&gt; sequences of chromosomes 4, 9, and 12 are out of sequence of those of apes as a result of nine [known] pericentric inversions. Radiation generally causes random damage (obliteration) of the coding sequences of the &lt;span class=&quot;caps&quot;&gt;DNA&lt;/span&gt;. The nature of such damage is highly unlikely to cause chromosome pair fusion or pericentric inversions. If radiation had affected the population, one would expect to see a higher degree of variability in the X chromosome as compared to other populations not having a lineage traceable to Oklo. Such variability doesnâ€™t exist.&lt;/p&gt;

	&lt;p&gt;3. Mitochondrial &lt;span class=&quot;caps&quot;&gt;DNA&lt;/span&gt; studies show that the appearance of modern manâ€™s most recent common ancestor doesnâ€™t fit with the 1.7 million year timeline that studies at Oklo demonstrated would have been the time of the reactions. [See &#8220;Heyer, E., Zietkeiwicz, E., Rochowski, A., Yotova, V., Puymirat, J., and Labuda D. 2001. â€˜Phylogenetic and familial estimates of mitochondrial substitution rates: study of control region mutation in deep-rooting pedigrees.â€™ Am J Hum Genet 69:1113-1126.&#8221;] Oklo&#8217;s timing doesn&#8217;t fit with any other divergence model that I&#8217;m aware of. &lt;/p&gt;

	&lt;p&gt;To be certain, the latest genetic research suggests that manâ€™s relationship to apes is far more complex and convoluted than originally imagined. High levels of radiation in an isolated population of hominoids doesnâ€™t appear to play well in emerging genetic research.&lt;/p&gt;

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		<content:encoded><![CDATA[<p>Benjamin,</p>
<p>I found your comments to be intriguing. However, there are a number of problems that need to be overcome in order for your analysis to work.</p>
<p>1. The highly radioactive waste generated at Oklo was held in place by granite, sandstone, and clays surrounding the deep ground reaction sites. None of it made it to the surface to irradiate human ancestors. [Cowan, G. A. 1976. &#8220;A Natural Fission Reactor,&#8221; Scientific American, 235:36, pp39]</p>
<p>2. Humans have two less chromosomes as compared to apes. Most scientists favor a fusion of the #2 and #3 karyotypes of apes to form chromosome #2 (your conjoined chromosome) in humans as an explanation. Additionally the <span class="caps">DNA</span> sequences of chromosomes 4, 9, and 12 are out of sequence of those of apes as a result of nine [known] pericentric inversions. Radiation generally causes random damage (obliteration) of the coding sequences of the <span class="caps">DNA</span>. The nature of such damage is highly unlikely to cause chromosome pair fusion or pericentric inversions. If radiation had affected the population, one would expect to see a higher degree of variability in the X chromosome as compared to other populations not having a lineage traceable to Oklo. Such variability doesnâ€™t exist.</p>
<p>3. Mitochondrial <span class="caps">DNA</span> studies show that the appearance of modern manâ€™s most recent common ancestor doesnâ€™t fit with the 1.7 million year timeline that studies at Oklo demonstrated would have been the time of the reactions. [See &#8220;Heyer, E., Zietkeiwicz, E., Rochowski, A., Yotova, V., Puymirat, J., and Labuda D. 2001. â€˜Phylogenetic and familial estimates of mitochondrial substitution rates: study of control region mutation in deep-rooting pedigrees.â€™ Am J Hum Genet 69:1113-1126.&#8221;] Oklo&#8217;s timing doesn&#8217;t fit with any other divergence model that I&#8217;m aware of. </p>
<p>To be certain, the latest genetic research suggests that manâ€™s relationship to apes is far more complex and convoluted than originally imagined. High levels of radiation in an isolated population of hominoids doesnâ€™t appear to play well in emerging genetic research.</p>
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		<title>By: Benjamin Napier</title>
		<link>http://earthsky.org/human-world/how-human-culture-evolved/comment-page-1#comment-5707</link>
		<dc:creator>Benjamin Napier</dc:creator>
		<pubDate>Sat, 29 Nov 2008 10:56:47 +0000</pubDate>
		<guid isPermaLink="false">http://208.96.63.114/?p=3736#comment-5707</guid>
		<description>	&lt;p&gt;Might ought to think about an opposing thumb and the concept of sentience as well. Our brains differ in a major way from other primates.&lt;/p&gt;

	&lt;p&gt;There is evidence to support that the continent of Africa had a large surface nuclear reaction about 800 million years ago. That is where humans are said to have originated. It could very well be that the conjoined chromosome that differentiates our genetic material from that of the great apes is the result of a radioactive effect on our forebears. Radioactive induced mutation, as it were. Also, there was a massive die-off or humans about 75,000 years ago that was likely the result of the Toba Caldera volcano in the Indonesia area. This caused a bottleneck in our genetic evolution.&lt;/p&gt;

	&lt;p&gt;Fascinating stuff.&lt;/p&gt;

</description>
		<content:encoded><![CDATA[<p>Might ought to think about an opposing thumb and the concept of sentience as well. Our brains differ in a major way from other primates.</p>
<p>There is evidence to support that the continent of Africa had a large surface nuclear reaction about 800 million years ago. That is where humans are said to have originated. It could very well be that the conjoined chromosome that differentiates our genetic material from that of the great apes is the result of a radioactive effect on our forebears. Radioactive induced mutation, as it were. Also, there was a massive die-off or humans about 75,000 years ago that was likely the result of the Toba Caldera volcano in the Indonesia area. This caused a bottleneck in our genetic evolution.</p>
<p>Fascinating stuff.</p>
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	<item>
		<title>By: Drr John Paul Schwartz</title>
		<link>http://earthsky.org/human-world/how-human-culture-evolved/comment-page-1#comment-5705</link>
		<dc:creator>Drr John Paul Schwartz</dc:creator>
		<pubDate>Sat, 29 Nov 2008 10:09:36 +0000</pubDate>
		<guid isPermaLink="false">http://208.96.63.114/?p=3736#comment-5705</guid>
		<description>	&lt;p&gt;The coordination to produce alchoholic beverages must&#8217;ve been a great incentive to cooperate and encourage farming.&lt;br /&gt;
Is that in any evidence for this?&lt;/p&gt;

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		<content:encoded><![CDATA[<p>The coordination to produce alchoholic beverages must&#8217;ve been a great incentive to cooperate and encourage farming.<br />
Is that in any evidence for this?</p>
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	<item>
		<title>By: Drr John Paul Schwartz</title>
		<link>http://earthsky.org/human-world/how-human-culture-evolved/comment-page-1#comment-5704</link>
		<dc:creator>Drr John Paul Schwartz</dc:creator>
		<pubDate>Sat, 29 Nov 2008 10:09:25 +0000</pubDate>
		<guid isPermaLink="false">http://208.96.63.114/?p=3736#comment-5704</guid>
		<description>	&lt;p&gt;The coordination to produce alchoholic beverages must&#8217;ve been a great incentive to cooperate and encourage farming.&lt;br /&gt;
Is that in any evidence&lt;/p&gt;

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		<content:encoded><![CDATA[<p>The coordination to produce alchoholic beverages must&#8217;ve been a great incentive to cooperate and encourage farming.<br />
Is that in any evidence</p>
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