<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/d5856af8-0b30-4c19-8775-b8275bfd096e/C33CF1A5-8E4E-4983-99BD-86FD1C0363BE/" 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://blogs.discovermagazine.com/80beats/2009/09/17/the-real-problem-with-a-human-trip-to-mars-radiation/" href="http://blogs.discovermagazine.com/80beats/2009/09/17/the-real-problem-with-a-human-trip-to-mars-radiation/" style="font-size: 11px;">blogs.discovermagazine.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blogs.discovermagazine.com/80beats/2009/09/17/the-real-problem-with-a-human-trip-to-mars-radiation/"><P>The radiation comes in the form of <YOONO-HIGHLIGHT class="yoono-link-hover yoono-link-active-link" keywords="cosmic rays">cosmic rays</YOONO-HIGHLIGHT>, which<SPAN> are actually speeding protons and heavier atomic nuclei that rain onto our solar system from all directions. They can slice through DNA molecules when they pass through living cells and the resulting damage can lead to cancer [<A href="http://www.newscientist.com/article/mg20327266.100-too-much-radiation-for-astronauts-to-make-it-to-mars.html"><EM>New Scientist</EM></A>]. </SPAN>The residents of Earth and the temporary lodgers at the International Space Station are protected from the rays by the Earth’s magnetic field, but astronauts heading to Mars would have no natural protection. Aluminum or plastic shielding on a spacecraft would have to be impractically thick to safeguard astronauts, and other solutions, like the <A href="http://blogs.discovermagazine.com/80beats/2008/11/04/traveling-to-mars-youll-need-this-miniature-magnetic-force-field/">creation of a miniature magnetic field</A> around the spaceship, are still being developed.</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/C33CF1A5-8E4E-4983-99BD-86FD1C0363BE/blog/" title="blog or email this clip"><img src="http://content8.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>

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