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
Wow!  I had no idea there was that much money in the sport!  If that was back in 2008, imagine what it is now in 2018!
I'm sure it has grown! Horse racing varies widely in format and across countries