Origin of Vision discovered


	Origin of Vision discovered

Oortcloud

10-22-2007 3:32 AM

1242 views

tags:

origin, vision, sight, eyes, biology, evolution

Oortcloud says:

Very cool stuff.

3 Comments |

Add a Comment

10-22-2007 8:53 AM

debbyski

Wowo.

10-22-2007 10:21 AM

invictus

Very interesting stuff. Thanks Oortcloud.

10-22-2007 7:23 PM

Fucc Copyrights

cool!

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/c533f1ee-7cf0-44b4-83dc-8ddf17687a61/06B459BE-5F7F-4A3E-AA13-D9B1A69FC13C/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.livescience.com/php/multimedia/imagedisplay/img_display.php?pic=071017-opsin-hydra-02.jpg&cap=Opsin+genes+%28blue%29+are+present+and+expressed+in+the+cnidarian+Hydra.+Credit%3A+David+Plachetzki%2C+UCSB&title=Origin+of+Vision+Discovered&title=Origin%20of%20Vision%20Discovered" href="http://www.livescience.com/php/multimedia/imagedisplay/img_display.php?pic=071017-opsin-hydra-02.jpg&cap=Opsin+genes+%28blue%29+are+present+and+expressed+in+the+cnidarian+Hydra.+Credit%3A+David+Plachetzki%2C+UCSB&title=Origin+of+Vision+Discovered&title=Origin%20of%20Vision%20Discovered" style="font-size: 11px;">www.livescience.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/php/multimedia/imagedisplay/img_display.php?pic=071017-opsin-hydra-02.jpg&cap=Opsin+genes+%28blue%29+are+present+and+expressed+in+the+cnidarian+Hydra.+Credit%3A+David+Plachetzki%2C+UCSB&title=Origin+of+Vision+Discovered&title=Origin%20of%20Vision%20Discovered"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/www.livescience.com/img/4B2E0C7F-C12C-4462-9302-029AEFE397CC" alt="" /></div></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content6.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.livescience.com/animals/071018-vision-origins.html" href="http://www.livescience.com/animals/071018-vision-origins.html" style="font-size: 11px;">www.livescience.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html"><P>
You are reading these words right now because 600 million years ago, an aquatic animal called a <EM>Hydra</EM> developed light-receptive genes—the origin of animal vision. 
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html"><P>
It wasn't exactly <A href="http://www.livescience.com/mysteries/070118_vision_2020.html">20-20 vision</A> back then though. 
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html"><P>
<EM>Hydras</EM>, a genus of freshwater animals that are kin to corals and jellyfish, measure only a few millimeters in diameter and have been around for hundreds of millions of years. 
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html"><P>
Though they don't have eyes or any specific light-receptive organs, researchers think that the light-sensing proteins concentrated in the mouth area of the <EM>Hydras</EM> help them to use light sensitivity to search out prey. 
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html"><P>
"We now have a time frame for the evolution of animal light sensitivity," said study leader David Plachetzki, a UC Santa Barbara graduate student. "We know its precursors existed roughly 600 million years ago. 
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/animals/071018-vision-origins.html">
These findings, detailed in a recent issue of the online journal <EM>PLoS ONE</EM>, counter arguments by anti-evolutionists that evolution can only eliminate traits and cannot produce new features</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/06B459BE-5F7F-4A3E-AA13-D9B1A69FC13C/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>