I did my Pecha Kucha Presentation on the history, impact, and controversy of the marathon and its two hour barrier. It is a very unique and interesting perspective that explains where the marathon came from, how it grew in popularity, who the best marathon runner is today and how he has made attempts to break the last, and most formidable, athletic barrier. I highly recommend giving it a listen if you are into running or just want something new to learn!
You can listen to my presentation here.