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!
Horse racing
Horse racing is an equestrian performance sport, typically involving two or more horses ridden by jockeys (or sometimes driven without riders) over a set distance for competition. It is one of the most ancient of all sports, as its basic premise – to identify which of two or more horses is the fastest over a set course or distance – has been unchanged since at least classical antiquity.
Horse races vary widely in format and many countries have developed their own particular traditions around the sport. Variations include restricting
Connections to horse racing and training.
Racing at Newmarket has been dated as far back as 1174, making it the earliest known racing venue of post-classical times. King James I (reigned 1603–1625) greatly increased the popularity of horse racing there, and King Charles I followed this by inaugurating the first cup race in 1634. The Jockey Club's clubhouse is in Newmarket, though its administration is based in London.
Connections to horse racing and training Stables and training industry.
Around 3,000 race horses are stabled