We're coming up on the 20th anniversary of Star Trek: Deep Space Nine, but it's still amazing how ground-breaking that show feels. Deep Space Nine didn't just defy our expectations of what a Star Trek show could be — it also helped to transform our ideas about genre television, in general. To watch DS9 is to have an unforgettable impression of its characters and themes — and yet, there are probably still secrets of DS9 that you haven't learned yet.
Here are 10 things we're betting you never knew about Star Trek: Deep Space Nine. Want more of this stuff? Here's 10 things you probably didn't know about the Original Star Trek, and 10 things you probably didn't know about Star Trek: The Next Generation.