1) Known Space alien species 
The Tnuctipun (singular Tnuctip) are a fictional extinct alien species in Larry Niven`s Known Space series. Tnuctipun were small, arboreal pack predators, averaging about 3–4 feet long. Their heads were long and lean, and their eyes opened laterally. They were highly intelligent (IQ estimated around 130–140, according to the short story `In .....