Some of the most famous alien races in all of science fiction originate in the "Star Trek" universe. From the violent, war-mongering Klingons to the silly, furry Tribbles, there are any number of ...

With tons of "Star Trek" alien races depicted over the decades, consistency is a tall order. And in the case of these aliens, major changes went unexplained.

Add Yahoo as a preferred source to see more of our stories on Google. The fourth episode of Starfleet Academy, “Vox In Excelsio,” made some huge changes to the most famous alien race in all of Star ...