Dolphins keep an eye out while sleeping


	Dolphins keep an eye out while sleeping

chestnut501

5-4-2009 7:00 AM

831 views

chestnut501 says:

Sea mammals rest one half of their brain while other half remains conscious

2 Comments |

Add a Comment

5-4-2009 7:32 AM

ratcatcher2

Clever animal.

5-4-2009 9:06 PM

shaor

yes but Sad!

Login to Comment. Not a member yet? Sign up

Today's Top Clips

visit the Top Clips page

View the Top Clips from May 4, 2009

Embed This Clip In Your Site...

<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/2790704d-df38-4c7c-9596-9696a8211cde/26D7DFDD-1B46-4F4C-A7BA-6EE0C1FBAAD1/" 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.msnbc.msn.com/id/30519133/" href="http://www.msnbc.msn.com/id/30519133/" style="font-size: 11px;">www.msnbc.msn.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.msnbc.msn.com/id/30519133/">Because they need to periodically come up for air and keep an eye out for 
potential predators, <A 
href="http://www.livescience.com/topic/dolphins">dolphins</A> can't curl up and 
zonk out at night like land mammals can. So they must stay somewhat conscious 
and <A 
href="http://www.livescience.com/common/media/video/player.php?videoRef=pur5265_babydolphins_sc">sleep</A> 
with the proverbial one eye open. </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.msnbc.msn.com/id/30519133/"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/www.msnbc.msn.com/img/508EB856-7DAD-404A-A1D9-41121C0D1D67" alt="Image: Dolphin" /></div></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.msnbc.msn.com/id/30519133/"><P itxtvisited="1" ndPar="[object Object]"><SPAN id="byLine" itxtvisited="1"></SPAN>Dolphins have binocular vision (with their eyes sitting on opposite sides of their head), so the researchers trained one of the dolphins (<A href="http://www.livescience.com/animals/060508_dolphin_names.html">named Say</A>) to recognized two shapes, either three horizontal red bars or one vertical green bar. They trained Say with her right eye first. </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.msnbc.msn.com/id/30519133/"><P itxtvisited="1" ndPar="[object Object]"><SPAN id="byLine" itxtvisited="1"></SPAN>The scientists thought that because half of the dolphin's brain would be asleep during testing, Say would only recognize the shapes with the eye connected to the conscious half of her brain. But she gave them a surprise: She trained her left eye on the shapes, even though that eye had not seen the shapes before. </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.msnbc.msn.com/id/30519133/"><P itxtvisited="1" ndPar="[object Object]"><SPAN id="byLine" itxtvisited="1"></SPAN>Researchers checked the dolphins' blood for physical signs of sleep deprivation, but couldn't find any. </P></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/26D7DFDD-1B46-4F4C-A7BA-6EE0C1FBAAD1/blog/" title="blog or email this clip"><img src="http://content9.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>

New from the makers of Clipmarks: Amplify.com - Don't just share the news...Amplify it!

Clipmarks: Home; New Clips; Top Clips; Dashboard

Popular Topics: News; Life; Science; Technology; Entertainment

Get Started: Sign Up; Install Clipping Tool; How Clipping Works; Clip-to-Blog™; ClipSearch

Tools and Resources: FAQ; ClipWeek; Top Clippers; Top Tags; Site Map

About Clipmarks: About Us; Contact; Copyright; Privacy; EULA

Search Options

Today's Top Clips