The parents of a mule are a male donkey and a female horse, and once born, mules cannot have children of their own.
Idaho is now a month old, and so far seems to be perfectly healthy.
Cloning is banned in horse racing but not show-jumping, so there is a chance that in the future champion horses could be cloned.
Two brothers to Idaho could be on the way soon too, since two other mares are pregnant with cloned mules as well.
US scientists clone Idaho the mule
Watch Ellie Crisell's report
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