Of all the objects in the Universe, few are as perplexing as black holes . Over the last decade, gravitational-wave observatories have revealed them in bewildering variety: giant black holes far chunkier than we thought possible, black holes rotating at dizzying speeds , and pairs so mismatched that scientists struggled to explain them. Now, with the latest release of gravitational-wave data from the LIGO-Virgo-KAGRA collaboration, astronomers finally have enough detections to move beyond