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Official Site: Larry Niven

The Kzinti (singular Kzin) are a fictional, very warlike and bloodthirsty race of cat-like aliens in Larry Niven's Known Space series.

The Kzinti were initially introduced in Niven's story "The Warriors" (originally in Worlds of If, 1966) and "The Soft Weapon", (1967), both collected in Neutron Star (1968). A Kzin character, Speaker-to-Animals (later known as Chmeee), subsequently played a major role in Niven's Hugo and Nebula award-winning Ringworld (1970) and Ringworld Engineers (1980), giving considerably more background of the Kzinti and their interactions with human civilizations. Following Ringworld, Niven gave permission to several friends to write stories taking place in the time following "The Warriors" but before "The Soft Weapon"; these stories (including a handful by Niven) were collected in a number of volumes of The Man-Kzin Wars, which eventually reached thirteen volumes, the first published June 1988. Kzinti also appear in Juggler of Worlds (2008) and Fate of Worlds (2012), novels within the Fleet of Worlds series (cowritten with Edward M. Lerner).

Kzinti evolved from a plains hunting felid on a slightly colder, drier planet than Earth. The Kzin word for their home planet translates as Homeworld. The world is often known as Kzinhome by the Kzinti themselves. The Kzin home world is the third planet orbiting the star 61 Ursae Majoris.

The Kzin civilization was at an iron-age technological level when an alien race called the Jotok landed and made stealthy First Contact with a tribe of primitive hunter/gatherer Kzinti. The Jotok were interstellar merchants looking for a species they could use as mercenaries.

The Kzin has not been a contender in any CBUB matches.