This cube craft is a Klingon, based on the Star Trek original series, the papercraft was created by 7ater. The Klingons were a humanoid warrior species that originated from the planet Qo'noS, an M-class planet. One of the major powers of the galaxy, the Klingons were a proud, tradition-bound people who valued honor and combat. The aggressive Klingon culture had made them an interstellar military power to be respected and feared. Klingons believed that they had the instinctive ability to look an opponent in the eye and see any intent to kill.
The most distinctive feature of Klingon anatomy was a sagittal crest, beginning on the forehead and often continuing over the skull. The cranium was encased in an exoskeleton, which possesses a feature known as the tricipital lobe.
On average, Klingons were larger and physically stronger than Humans, though they possessed a much lower tolerance for cold weather. Spock said once that Klingons lack tear ducts; however, Klingon myth states that Kahless once filled the ocean with his tears, and at least one Klingon, Kurn, has produced tears. Klingon blood can contain ribosomes that are compatible for transfusion with a Romulan.
Internally, Klingon anatomy was markedly different from that of Humans. There is a great deal more multiple redundancy in their organs, a principle they call brak'lul. This allowed Klingons to survive severe injuries in battle. They had twenty-three ribs, two livers, an eight chambered heart, three lungs, and even redundant neural function and multiple stomachs. Some geneticists believed that the extra organs, notably the third lung, evolved to give Klingons greater stamina on the battlefield. Surprisingly, Klingons had relatively little knowledge of their own biology and their medicine is very poorly developed. This was largely due to their warrior traditions - a Klingon who is wounded was expected to be left to survive through his own strength, die, or to undergo the hegh'bat, a form of ritual suicide.
It is interesting to note that, despite the anatomical and physiological differences between Klingons and Humans, the two species had very similar nutritional requirements. Dr. Pulaski once noted that, while most Humans find Klingon food unpalatable, usually, "what kills us, kills them." However, the "tea" used in the Klingon tea ceremony seems to be an exception. Apparently, the tea concentrates some toxic heavy elements found in the soil in which its plant of origin grows, synthesizing a poison deadly to Humans, and capable of seriously sickening Klingons, as it does.
Klingon pregnancies normally ran thirty weeks, but with mixed species, gestation times were shorter. The odds against Klingon-Human conceptions were rather high; however, when successful, Klingon and Human metabolisms sometimes clashed, causing biochemical fluctuations in the mother, which may lead to fainting. Klingon traits remained dominant for several generations, even with a single ancestor; therefore, a child even ¼ Klingon still possessed forehead ridges if he or she carried the gene.
Klingons had ridged spines, chests and feet. After birth some Klingon infants experienced a pronounced curvature to the spine, which was correctable by surgery. This "defect" tended to run in Klingon families, especially among females. Federation medicine, fortunately, advanced beyond that, allowing an additional choice of treatment involving genetic modification.
Klingon children matured far more quickly than Human children. At the age of only one Earth year, a Klingon child had the appearance a Human child had at about four. By the age of eight Earth years, a Klingon attained the maturity a Human did not reach until about age sixteen. When Klingon children began growing into adults, they went through jak'tahla, a Klingon form of puberty. Like other mammalian species, Klingon females were capable of lactating to breast-feed infants.
Klingons tended to live for over 150 years, but even into advanced old age, they tended to still be strong enough for combat.
Doctor Julian Bashir once sarcastically noted that the natural odor produced by Klingons was comparable to an "earthy, peaty aroma with a hint of lilac".
As evidenced with Kurn, Klingons had the instinctive ability to sense the decision to kill by looking into the eyes of their opponents. Worf did not have this ability, probably due to the fact that he was raised by Humans on Earth.
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