I work in professional horse racing and set the odds for horses!
I see, horse racing is one of the most ancient sports!
Is it really?  How far back does it go?
I imagine it would go back as far as we have been riding horses! In the broadest sense, it involves two or more horses ridden by jockeys over a set distance
You are right.  Humans seem to always be competing at something, why not horses.  What is the most prestigious horse race?
There are prestigious horse races in many countries. Gambling is what really sets horse racing apart from other sports though. It generated a $115 billion worldwide market in 2008