<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/4f82a94e-c10e-4224-8c50-ff103feaa03b/39544416-EBDE-4120-A708-6EFEDDC8208B/" 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://news.bbc.co.uk/2/hi/science/nature/6676461.stm" href="http://news.bbc.co.uk/2/hi/science/nature/6676461.stm" style="font-size: 11px;">news.bbc.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><DIV class="sh"> Ice Age blast 'ravaged America' </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://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><FONT size="2"> <TABLE width="203" cellspacing="0" cellpadding="0" border="0" align="right"><TBODY><TR><TD><DIV> <IMG width="203" vspace="0" hspace="0" height="152" border="0" alt="Artist's impression of a comet strike, BBC" src="http://newsimg.bbc.co.uk/media/images/42952000/jpg/_42952177_comstrike_bbc_203.jpg" /> <DIV class="cap">A space rock may have exploded in the air over North America</DIV> </DIV> </TD></TR></TBODY></TABLE><B>A controversial new idea suggests that a large space rock exploded over North America 13,000 years ago. </B> </FONT></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://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><FONT size="2">The blast may have wiped out one of America's first Stone Age cultures as well as the continent's big mammals such as the mammoth and the mastodon. </FONT></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://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><FONT size="2">The blast, from a comet or asteroid, caused a major bout of climatic cooling which may also have affected human cultures emerging in Europe and Asia. </FONT></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://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><P> <FONT size="2">Scientists will outline their evidence this week at a meeting in Mexico. </FONT></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://news.bbc.co.uk/2/hi/science/nature/6676461.stm"><FONT size="2"> <TABLE width="208" cellspacing="0" cellpadding="0" border="0" align="right"><TBODY><TR><TD width="5"><IMG width="5" vspace="0" hspace="0" height="1" border="0" alt="" src="http://newsimg.bbc.co.uk/shared/img/o.gif" /></TD><TD class="sibtbg"><DIV> <DIV class="mva"> <IMG width="24" height="13" border="0" alt="" src="http://newsimg.bbc.co.uk/nol/shared/img/v3/start_quote_rb.gif" /> <B>Their impact theory shouldn't be dismissed; it deserves further investigation</B> <IMG width="23" vspace="0" height="13" border="0" align="right" alt="" src="http://newsimg.bbc.co.uk/nol/shared/img/v3/end_quote_rb.gif" /><BR clear="all" /> </DIV> </DIV> <DIV class="mva"> <DIV>Jeff Severinghaus, Scripps Institution of Oceanography</DIV> </DIV> </TD></TR></TBODY></TABLE>The evidence comes from layers of sediment at more than 20 sites across North America. </FONT></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/39544416-EBDE-4120-A708-6EFEDDC8208B/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>

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