I've actually never heard this term used, but there is a breed of donkey (though some contend this, actually) called the American Mammoth Jackstock donkey. I would assume that a Mammoth Mule would be a mule whose sire was a Mammoth Jackstock donkey.
FYI, a mule is the offspring of a donkey sire (jack) and a horse dam (mare). The offspring of a horse sire (stallion) and a donkey dam (jennet or jenny) is called a hinny and is much rarer than are mules.
Finally, a bit of trivia about American Mammoth Jackstock. The breed is said to have been created by George Washington, using large European donkey breeds, including the rare Poitou donkey from France. He wanted a large donkey to breed with draft mares to create a draft mule strong enough to plow the tough soils of Virginia.
A saddle mule is a mule used for transportation or riding, were as a pack mule is a mule used solely for transporting luggage rather then people.
Mule Skinner
Mules are sterile, a mule is the offspring of a donkey and horse, therefore sterile. A male mule can mate with a female mule, but will never get her pregnant.
A male mule is always sterile, however , rarely, a female mule will be able to reproduce.
The answer to that question is a mule. The mule is used to pull carts, and used on farms. The mule cannot reproduce, it's genes are unbalanced. It has more horse gene combinations then donkey combo's.
A Mammoth Jack is a LARGE donkey. The link below shows 'King Kalico' who stands 64 inches tall at the withers. A mule pony is a miniature mule, 48 inches or less at the withers. You can buy one (or more) at the link listed below.
Nothing. Majority of mules are sterile thus unable to produce offspring.
mule = Maultier mule = Muli
A saddle mule is a mule used for transportation or riding, were as a pack mule is a mule used solely for transporting luggage rather then people.
Mule Skinner
mule = Maultier mule = Muli
A bull mammoth
A donkey can have offspring that is a mule, a mule cannot have offspring that is a donkey.
an antonym of mammoth.
Wooly Mammoth :)
a mammoth represents leadership.
tête de mule (addressing the stubborn mule), têtu/têtue comme une mule (describing someone as stubborn as a mule) are standard French expressions.