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Discussion and Debate
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Physical & Life Sciences
My Leprechaun Challenge
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<blockquote data-quote="LittleLambofJesus" data-source="post: 65751548" data-attributes="member: 376868"><p>Did Leprechauns evolve from pygmies/midgets or vice-versa?</p><p> </p><p><a href="http://en.wikipedia.org/wiki/Pygmies" target="_blank">http://en.wikipedia.org/wiki/Pygmies</a></p><p> </p><p>Various theories have been proposed to explain the short stature of pygmies. Some studies suggest that it could be related to adaptation to low <a href="http://en.wikipedia.org/wiki/Ultraviolet_light" target="_blank">ultraviolet light</a> levels in <a href="http://en.wikipedia.org/wiki/Rainforest" target="_blank">rainforests</a>.<a href="http://en.wikipedia.org/wiki/Pigmy#cite_note-9" target="_blank">[9]</a><a href="http://en.wikipedia.org/wiki/Pigmy#cite_note-10" target="_blank">[10]</a> This might mean that relatively little <a href="http://en.wikipedia.org/wiki/Vitamin_D" target="_blank">vitamin D</a> can be made in human skin, thereby limiting <a href="http://en.wikipedia.org/wiki/Calcium" target="_blank">calcium</a> uptake from the diet for bone growth and maintenance, and leading to the evolution of the small skeletal size.<a href="http://en.wikipedia.org/wiki/Pigmy#cite_note-o-11" target="_blank">[11]</a></p><p> </p><p><a href="http://blogs.discovermagazine.com/gnxp/files/2012/04/220px-African_Pigmies_CNE-v1-p58-B.jpg" target="_blank"><img src="http://blogs.discovermagazine.com/gnxp/files/2012/04/220px-African_Pigmies_CNE-v1-p58-B.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p> </p><p>Africa is thought to be the location of origin of modern humans within the past 200,000 years and the source of our dispersion across the globe within the past 100,000 years. </p><p>It may be that Pygmies are in many ways <em>derived </em>in their phenotypes, relatively recent adaptations to contemporary exigencies. </p><p> </p><p>Over the years one issue that crops up repeatedly in human evolutionary genetics and paleoanthropology (or more precisely, the popular exposition of the topics in the media) is the idea that is that &#8220;population X are the most ancient Y.&#8221; X will always refer to a population within a larger set, Y, which is defined by relative marginalization or retention of older cultural folkways. So, for example, I have seen it said that the Andaman Islanders are the &#8220;most ancient Asian population.&#8221; Why? The standard model for a while now has been that non-Africans derive from a line of Africans which left the ancestral continent 50 to 100 thousand years ago, and began to diversify...................</p><p> </p><p> </p><p> </p><p> </p><p>.</p></blockquote><p></p>
[QUOTE="LittleLambofJesus, post: 65751548, member: 376868"] Did Leprechauns evolve from pygmies/midgets or vice-versa? [URL]http://en.wikipedia.org/wiki/Pygmies[/URL] Various theories have been proposed to explain the short stature of pygmies. Some studies suggest that it could be related to adaptation to low [URL="http://en.wikipedia.org/wiki/Ultraviolet_light"]ultraviolet light[/URL] levels in [URL="http://en.wikipedia.org/wiki/Rainforest"]rainforests[/URL].[URL="http://en.wikipedia.org/wiki/Pigmy#cite_note-9"][9][/URL][URL="http://en.wikipedia.org/wiki/Pigmy#cite_note-10"][10][/URL] This might mean that relatively little [URL="http://en.wikipedia.org/wiki/Vitamin_D"]vitamin D[/URL] can be made in human skin, thereby limiting [URL="http://en.wikipedia.org/wiki/Calcium"]calcium[/URL] uptake from the diet for bone growth and maintenance, and leading to the evolution of the small skeletal size.[URL="http://en.wikipedia.org/wiki/Pigmy#cite_note-o-11"][11][/URL] [URL="http://blogs.discovermagazine.com/gnxp/files/2012/04/220px-African_Pigmies_CNE-v1-p58-B.jpg"][IMG]http://blogs.discovermagazine.com/gnxp/files/2012/04/220px-African_Pigmies_CNE-v1-p58-B.jpg[/IMG][/URL] Africa is thought to be the location of origin of modern humans within the past 200,000 years and the source of our dispersion across the globe within the past 100,000 years. It may be that Pygmies are in many ways [I]derived [/I]in their phenotypes, relatively recent adaptations to contemporary exigencies. Over the years one issue that crops up repeatedly in human evolutionary genetics and paleoanthropology (or more precisely, the popular exposition of the topics in the media) is the idea that is that “population X are the most ancient Y.” X will always refer to a population within a larger set, Y, which is defined by relative marginalization or retention of older cultural folkways. So, for example, I have seen it said that the Andaman Islanders are the “most ancient Asian population.” Why? The standard model for a while now has been that non-Africans derive from a line of Africans which left the ancestral continent 50 to 100 thousand years ago, and began to diversify................... . [/QUOTE]
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