The terms triped, tripedal and tripedalism are rarely, if ever, used in a real scientific context, as there are no known naturally occurring three-legged animals on Earth, although the movement of some Macropods such as kangaroos, which can alternate between resting their weight on their muscular tails and their two hind legs, may be an example of tripedal locomotion in animals.
In the H. G. Wells novel The War of the Worlds the tripedal theme is ever present. Although it is not used in the biological sense (excluding the 2005 cinematic version, which did include three-legged aliens), the Martians use tripedal-themed machines known as Tripods.
In 1997 the Science fiction TV show Star Trek: Voyager presented Species 8472, an advanced and aggressive tripedal race (they have three, five-jointed legs), who, when encountered are at war with the Borg, they were one of the more unusual alien creatures to be shown in Star Trek.
There are also Tripeds known as Muddlets, in the Deltora series.
Pierson's Puppeteers, a fictional alien race created in the Known Space universe by author Larry Niven, have two forelegs and a single hindleg ending in hooved feet and two snake-like heads instead of a humanoid upper body.
The Lost History of Christianity: The Thousand-Year Golden Age of the Church in the Middle East, Africa, and Asia-And How It Died
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