"Star Trek" is all about exploring new planets and — despite Gene Roddenberry not caring about creating new civilizations — discovering new cultures. Throughout the franchise's tenure, the Enterprise and other Starfleet crews have encountered aliens of all shapes, sizes, and colors with varying lifespans. Some lived similar lengths of time as humans; others had shorter lifespans, and a few could live multiple human lifetimes. The Q is probably the most popular race of long-lived beings in "Star Trek," but it's far from the only one, nor is it the most fascinating. Sure, Paramount might not have plans to green-light any new "Star Trek" shows or movies for the foreseeable future, but if and when it ever returns to the big or small screen, perhaps there will be more of the near-immortal aliens.