Many believe that the story first began in America in 1877, when two friends were arguing over whether a horse ever had all four feet or hooves off the ground when it galloped.

很多人都相信这个故事最初于1877年发生于美国，当时两个朋友在争论马在驰骋时四个蹄子是否都离地。

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Then she heard a sudden splashing of hooves and tony was gone. she opened the door a crack and saw frank leading a heaving stumbling horse into the carriage house.

接着，思嘉突然听到一阵马蹄溅水的声音，托尼走了，她打开一道门缝，看见弗兰克牵着一匹喘着气、跌跌绊绊的马进了马房。

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Suddenly the sound of hooves could be heard and seconds later a woman riding a black horse was visible.

突然一阵马蹄声传来，不久一个骑马的女子映入她们的眼帘。

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When a horse is galloping, its hooves hit the ground at about 15kph, and this causes damaging vibrations in the animal's legs.

ECONOMIST: Veterinary technology

At Miraval, Life in Balance, guests are invited to try any number of "challenge" activities--balancing a feather on the palm of the hand, climbing (while tethered) the 25-foot Quantum Leap pole and then jumping off, learning to approach a horse and pick up its hooves.

FORBES: Magazine Article

In each stride horses lift all four hooves off the ground at once, something that George Stubbs, the most famous horse painter of the last 300 years, had guessed at but which, until Muybridge, had never been proved.

ECONOMIST: The many influences of an inventive early photographer