Hold your horses for the most interesting horse facts on the web, including early horse history, surprising trivia, and etymology.

1. Horses can sleep standing up by locking their leg joints.

2. A horse’s hoof acts as a type of pump. When a horse puts pressure on its hoof, the blood is squeezed up the leg into the veins.

3. Horses have a strong band of muscles around their esophagus. This band is so strong that a horse’s stomach would burst before it would vomit.

4. Horses cannot breathe through their mouth, only through their nose.

5. Horses produce about 10 gallons of saliva—per day.

6. A horse’s teeth take up more room in its head than its brain.

7. Equinophobia is the fear of horses.

8. Horses have the largest eyes of any land mammal.  They can also see nearly 360 degrees.

9. The horses’ closest relative is not the cow, pig, or goat—but the rhinoceros.

10. The word “chivalry” comes from the French cheval, meaning horse.

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