Kiddos,
I know it's hard for you to comprehend but Mark Nenow held the AR for almost 15 years (from 1986-2001) at 27:20.56.
25, years ago from today, Meb ran 27:13.98 and Meb held it for almost 9 years until Chris Solinsky ran 26:59.60 in Palo Alto in 2010.