Will we ever see a sub-2 hour marathon?

Sports Scientist Post of the Month:  Will we ever see a sub-2 hour marathon? When Haile Gebrselassie broke his own world record by running 2:03:59 in Berlin, he ignited a wave of speculation about a sub-2 hour marathon.  Marathon running is in something of a golden age.  Ten years ago the world record stood at 2:06:50 and since then it has dropped almost three minutes.  Is there reason to expect this rapid drop will continue?  The guys at The Science of Sport have a detailed analysis of the question that is worth a read.  Here’s the link:  http://www.sportsscientists.com/2008/10/15959-sub-2-hour-marathon.html