<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/efa9af17-20ff-441b-bba9-ce5619b290d9/DAC325AB-D7D9-4304-95DF-597EEB9DF986/" 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.sparknotes.com/lit/elegantuniverse/summary.html" href="http://www.sparknotes.com/lit/elegantuniverse/summary.html" style="font-size: 11px;">www.sparknotes.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sparknotes.com/lit/elegantuniverse/summary.html"><H1>The Elegant Universe</H1></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.sparknotes.com/lit/elegantuniverse/summary.html"><DIV class="content_txt">In Part I of <SPAN class="chapt_body_italic">The Elegant Universe</SPAN>, “The Edge of Knowledge,” Greene introduces the central problem of modern physics: the incompatibility of Einstein's theory of general relativity with quantum mechanics. He then lists the physical curiosities—properties of the motion of light, gravity, and the behavior of particles at the subatomic level—that have prevented physicists from establishing a single coherent theory for how the universe works. For most of the twentieth century, physicists contented themselves with describing either the most small-scale or the most large-scale workings of the cosmos, but never both simultaneously. At the end of this section, Greene describes both the objectives and the promise of superstring theory, which attempts to merge the laws of general relativity with those of quantum mechanics. </DIV></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/DAC325AB-D7D9-4304-95DF-597EEB9DF986/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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