In 2019, astronomers recorded a distant star doing something unexpected. For about an hour, its brightness gently flared before settling back down to baseline levels. Its behavior matched no obvious stellar phenomenon – too long for a stellar flare, too brief for a supernova, and too smooth for most known kinds of stellar variability. Now, after a careful probe into the event's properties, astronomers say it could be a signal from one of the most elusive objects in the Universe: a tiny