Did you know that Kelso was awarded "Horse of the Year" 5 years in a row? Or that Edgar Prado was Barbaro's jockey on the day he broke his ankle at Preakness? Gallup through our quiz to test your horse-racing IQ.
Female racehorse Rachel Alexandra was shot by fashion phtographer Steven Klein for her August 2009 appearance in Vogue.
While the American Quarter Horse, Arabian and Thoroughbred are all breeds that race, the Clydesdale is a draught (work) horse. However, the occasional novelty Clydesdale race is held at Exeter in Devon, England.
Based on his impressive pedigree, The Green Monkey, a two-year-old colt, sold for $16 million (at the time, the highest price of an auctioned Thoroughbred), but failed to win any race.
Since 1868, the Jockey Club keeps the American Stud Book Principal Rules and Requirements. It is the official breed registry for American Thoroughbreds.
A timber topper is a horse who competes in steeplechase racing, which includes jumping obstacles.
When she retired in 1989, Personal Ensign was the first horse to end her career undefeated in more than 80 years.
The Triple Crown races, in the order they're run, are the Kentucky Derby, Preakness Stakes and Belmont Stakes.
Of the 15 horses in the race, Aristides was the winner of the first Kentucky Derby, finishing in 2 minutes, 37 seconds.
After Dancer's Image tested positive for the painkiller phenylbutazone, the win instead went to Forward Pass.
A horse who hasn't won a race is called a maiden. His or her first win is that horse's maiden victory.
The Saratoga Race Course, where the Travers Stakes is held, opened on August 3, 1863, is considered the oldest racetrack in North America.
Horse racing is also called the "sport of kings." Originally, the phrase applied to hunting.
Upset was the horse to upset Man o' War's perfect record.
As legend goes, Man o' War suffered from nightmares after his upset at Saratoga.
Sir Barton was the first to win the Triple Crown in 1919, followed by Gallant Fox in 1930, and, recently, American Pharoah in 2015. Because Man o' War, one of the most famous racehorses, never ran in the Kentucky Derby, he wasn't eligible for the Triple Crown.
Three percent of a horse's DNA is influenced by his great-great-great grandparents.
Experts estimate that genes are responsible for between 30 and 35 percent of a horse's performance. That's genes - not jeans.
Citation, who won 19 of his 20 races, had more than $1 million in career winnings.
A horse length, the length of the horse from its nose to tail, is 8 feet.
Experts estimate a horse racing in 2012 would beat a horse racing in 1997 by as many as 7 horse lengths. That's 56 feet!
The National Museum of Racing and Hall of Fame is in Saratoga Springs, New York. It was founded in 1950.
The "purse" is the money paid to the highest finishing horse owners. This usually includes the top five finishers.
A furlong, a measurement of distance, equals 1/8 of a mile. Competitors in the Kentucky Derby run 1 1/4 miles, which is equal to 10 furlongs.
The fastest recorded speed of a racehorse is 43.97 mph. That's just about 70.76 km/h.
In 2008, Thoroughbred Winning Brew set this record when she was two years old, at the Penn National Race Course, in Grantville, Pennsylvania.
In 1948, Secretariat ran the Kentucky Derby in 1 minute, 59 seconds. That year, he also won Preakness, which he ran in 1 minute, 53 seconds, and Belmont Stakes, which he ran in 2 minutes, 24 seconds.
When he was 3 years old, American Pharoah won both the Triple Crown and the Breeder's Cup Classic, making him the first horse to win the "Grand Slam."
After retiring from racing, Man o' War sired 379 named foals, including Clyde Van Dusen, Hard Tack and War Admiral. Hard Tack sired the famed Seabiscuit.
Count Fleet, the sixth Triple Crown winner, was owned by the family who were known for their rental car business.
La Troienne didn't have a particularly notable racing career, but she is considered to be one of the most influential broodmares, including offspring inducted into the Hall of Fame.
Champion Thoroughbred racehorse Seabiscuit was the subject of both a best-selling non-fiction book and Hollywood film. The 2003 film starred Tobey Maguire, Jeff Bridges and Elizabeth Banks.
Famous for his racing losses (he ended his career with 0 wins, 100 losses), and his temperament, Zippy Chippy was the horse who decided not to leave the starting gate when the bell went off.
The whole thing was over in less than 5 seconds. Zippy Chippy raced Rochester Red Wings center fielder Jose Herrera in a 40-yard dash -- and, in keeping with his record, lost.
Thoroughbred filly Ta Wee's name means "beautiful girl" in a Dakota dialect. Her five named foals were all winners.
Three-year-olds compete for the Triple Crown title. They are at the early stage of physical maturity, but still new enough to racing to offer some unpredictability.