COLLBRAN, Colo. - When it reportedly happened in Morocco five years ago, locals feared it signaled the end of the world. In Albania in 1994, it was thought to have unleashed the spawn of the devil on ...

WASHINGTON (AP) -- The first member of the horse family to be cloned is a mule named Idaho Gem, the genetic brother of a champion racer. Researchers say two other mule clones are expected to be born ...

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Forlornly braying, the mule lives a life of toil, barren of love. For like many hybrids, the mule is sterile. So skeptical of the few reported cases of mule fertility is Encyclopaedia Britannica that ...

As scarce as tropical snowstorms are cases of fertility in mules. Like many other hybrids, the cross between a horse and an ass rarely breeds, whether mated with another mule, ass or with a horse.