I ran across these two articles and video this past week, the studies that are being done in Ireland are fascinating! They are tracing the genetic origin of TB speed - looks like it was a Shetland!  

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. 


*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. 


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