<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/bf6706ec-cc13-4628-845a-f8e0e1a03ea7/4A8BDF94-633A-4F2C-92DC-8DBC63431A3E/" 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.ponderabout.com/archives/543/the-giant-impact-theory/" href="http://www.ponderabout.com/archives/543/the-giant-impact-theory/" style="font-size: 11px;">www.ponderabout.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.ponderabout.com/archives/543/the-giant-impact-theory/"><H2><A title="Permanent Link: The Giant Impact Theory" rel="bookmark" href="http://www.ponderabout.com/archives/543/the-giant-impact-theory/" linkindex="1" set="yes">The Giant Impact Theory</A></H2></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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>the <EM>Giant Impact Theory</EM> is today’s most widely accepted account of the formation of the Moon</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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>its was first proposed in by <A href="http://en.wikipedia.org/wiki/Planetary_science" linkindex="3">planetary scientist</A> William K. Hartmann in 1974</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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>the theory posits that some 4 1/2 billion years ago, Earth collided with a Mars-sized object</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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>in the video below, Dr. Robin Canup presents the computer modeling of the giant impact that she and colleagues at University of Colorado, Boulder published in 2001</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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>this model established The Giant Impact Theory as today’s best account of the moon’s formation</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.ponderabout.com/archives/543/the-giant-impact-theory/"><div align="center"><embed src="http://www.youtube.com/v/ibV4MdN5wo0" height="329" width="400" wmode="opaque" quality="high" type="application/x-shockwave-flash"></embed></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.ponderabout.com/archives/543/the-giant-impact-theory/"><P>the above video is excerpt from the History Channel’s <A href="http://www.history.com/minisite.do?content_type=mini_home&mini_id=54036" linkindex="4" set="yes">Universe</A> series</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/4A8BDF94-633A-4F2C-92DC-8DBC63431A3E/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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