Enlarge / Simulated image of two merging black holes detected by LIGO, viewed face-on. (credit: SXS Lensing) Physicists have "heard" the telltale ring of an infant back hole for the first time, thanks to a fresh analysis of LIGO data. Researchers specifically looked for telltale "overtones" in the data from the collaboration's Nobel Prize-winning detection of two black holes merging.