Horses have one of the largest eyes of any land mammal. The eyes of a horse are roughly 1.34 inches in diameter, surpassed only by the eyes of whales, seals and ostriches.

Horses can run within hours after birth.

Horses can sleep both lying down and standing up.

A horse's teeth take up a larger amount of space in their head than their brain.

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Because horse's eyes are on the side of their head they are capable of seeing nearly 360 degrees at one time.

Horse hooves are made from the same protein that comprises human hair and fingernails

It takes 9-12 months to re-grow an entire horse hoof.

The fastest recorded sprinting speed of a horse was 88 kph (55 mph). Most gallop at around 44 kph or 27 mph.

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Horses drink at least 25 gallons of water a day (more in hotter climates).

When horses look like they're laughing, they're actually engaging in a special nose-enhancing technique known as "flehmen," to determine whether a smell is good or bad

Horses use their ears, eyes and nostrils to express their mood. They also communicate their feelings through facial expressions.

Horses will not lie down simultaneously because at least one will act as a look-out to alert its companions of potential dangers.

Vocalizations are highly important to horses. Examples: Whinnying and neighing sounds are elicited when horses meet or leave each other. Stallions (adult male horses) perform loud roars as mating calls, and all horses will use snorts to alert others of potential danger

An adult horse's brain weights 22 oz, about half that of a human.

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Horses with typical anatomy are "obligate nasal breathers" which means they must breathe through their nostrils and cannot breathe through their mouths