For nearly half a century, Voyager 1 has been traveling farther than any human-made object in history, quietly slipping beyond the reach of the Sun and into a region we once thought was almost empty. Built in the 1970s, designed for a mission of just a few years, this fragile machine is still talking to us after 45 years in space. And what it is telling scientists now is deeply unsettling. Voyager 1 has reached a boundary no spacecraft was ever meant to study directly, and the data coming back does not fully match our models, our predictions, or our expectations. Tonight, we are going to uncover what Voyager 1 discovered, why scientists describe it as “impossible,” and how this single probe is forcing us to rethink the true nature of interstellar space.