Klingon
- Appearance: Mammalian; dark skin, forehead crest, prominent spinal ridges, sharp incisors; on average taller, larger than humans
- QuchHa' minority resulting from modified Qu'vat virus look near-identical to humans
- QuchHa' population reached several million by 2165, but was treated and reverted to HemQuch majority by end of 23rd century (ENT Novel: Live by the Code; TOS Novel: Forged in Fire)
- QuchHa' minority resulting from modified Qu'vat virus look near-identical to humans
- Lifespan: over 150 years (DS9: "Blood Oath")
- Homeworld: Qo'noS
- Low tolerance for cold (DS9: "Change of Heart"; VOY: "Displaced")
- Biological notes
- Magenta blood (Star Trek VI: The Undiscovered Country; DIS)
- Multiply redundant biological systems (TNG: "Ethics")
- Two livers, three lungs, eight-chambered heart, redundant neural functions (TNG: "Ethics")
- Children mature quickly (cf. Alexander)
- Technological notes
- Most Klingon designers tend to work from established, proven designs and expand or improve rather than produce entirely new fundamental foundations (VAN Novel: Summon the Thunder)
- Part of reasoning for basic Klingon ship design being essentially unchanged from 23rd to 24th century
- Most Klingon designers tend to work from established, proven designs and expand or improve rather than produce entirely new fundamental foundations (VAN Novel: Summon the Thunder)
- Cultural notes
- Klingon calendar
- Klingon faith
- Klingon language
- Klingon books
- Klingon food
- Originally generally caste-based (ENT: "Judgment")
- c.2100, domination of warrior caste of government, society led to general dissolution of the caste system (ENT: "Judgment")
- Focus on warrior precepts permeated general society, leading to warrior lifestyle seen as ultimate goal
- In core territories, other castes largely viewed in terms of ability to contribute to military goals
- Outside core territories, caste system held less strength previously, little changed (KE Novel: A Burning House)
- c.2100, domination of warrior caste of government, society led to general dissolution of the caste system (ENT: "Judgment")
- Weapons
- Bat'leth (Various)
- Curved, two-pointed, pointed blade
- Bat'leth (Various)
History
- 2016: First contact with Vulcans, leading to decades of war (ENT Novel: A Choice of Futures; DIS: "The Vulcan Hello"; TNG: "First Contact")
- April 2151: First contact with Humans; Broken Bow, Earth incident (ENT: "Broken Bow")
- November 2154: Qu'vat virus leads to creation of QuchHa' minority class in contrast to HemQuch majority (ENT: "Affliction")
- Early 2290s: Cure discovered for Qu'vat virus; QuchHa' cease to exist. Their former existence is largely denied or kept quiet with outsiders from this point forward. (TOS Novel: Forged in Fire; DS9: "Trials and Tribble-ations")