Hydrogen Iceberg

Guest: Darryl Seligman, TC Chamberlin Fellow, Department of the Geophysical Sciences, University of Chicago

A couple of years ago, astronomers caught a glimpse of a giant, cigar-shaped thing from outer space jaywalking through our solar system. It was the first interstellar object ever seen passing through our own solar system. Some speculated it was an alien spaceship. Astrophysicist Darryl Seligman has developed a more plausible theory.

Listen here.