Trinoc
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Trinocs are a fictional alien species in author Larry Niven's Known Space universe, so named for the fact that they have three eyes, giving them trinocular vision. Their first appearance was in the story "There Is A Tide" from Niven's Tales of Known Space, which describes first contact between a Trinoc explorer and Louis Wu. They are also mentioned in Ringworld and Ringworld's Children, though they do not appear onstage in those novels.
Trinoc*coN is an annual science fiction convention held in Durham, North Carolina.