The video gets at the question of "just what makes a champion?" - going through the mechanics* of a racing TB to discover just what makes these huge animals so fast, and what factors identify the ones that are truly incredible athletes.
Articles:
http://www.irishexaminer.com/breakingnews/sport/irish-scientist-traces-racehorse-speed-to-ponies-537143.html
http://www.horsetalk.co.nz/news/2012/01/200.shtml
Video:
http://www.youtube.com/watch?feature=player_embedded&v=QsvS6gEBJuE
*If you are very squeamish, I would not suggest watching the video without preparing yourself - just a word to the wise - it is an excellent exploration and very worth watching, but does involve the majority of an equine necropsy.
Enjoy!