UFO Iceberg

Several years ago, astronomers caught a glimpse of a giant, cigar-shaped thing from outer space jaywalking through the neighborhood. It was the first interstellar object ever seen passing through our own solar system. Some speculated it was an alien spaceship. Astrophysicist Darryl Seligman, a post-doctoral fellow at the University of Chicago, has developed a more plausible theory. (Originally aired Jun 10, 2020).