In horse racing greatness is defined by speed. Being the second fastest counts for little. You have to win. And win. And keep winning until every challenger of your generation is put to the sword. Of the twelve horses lined up on Newmarket Heath that 2011 day, one would do just that. And more. To become the greatest racehorse that has ever lived. Frankel was born on 11 February 2008, with four white socks and a blaze, from impressive equine...