Tralfamadorians – Kurt Vonnegut’s novels
There aren’t many races as interesting as the Tralfamadorians from Tralfamadore. They exist at all points in time always, so they have unending knowledge of the past, present, and future. They also look like big green hands with eyeballs in the palm, and have been known to abduct humans, put them in a synthetic environment, and watch them mate. What’s not to like?