Experts did not think that in the clusters of globular stars, in the dense ensembles formed by thousands of old stars, black holes could survive, as indicated by computer drills. It is estimated that if a black hole arose, it would at first go to the center of the cluster, but would soon be eliminated by the gravitational interactions of the large group of stars. However, astronomers at the University of Southampton have seen the footprint of a black hole in a cluster of stars. They have concluded that black holes can not only last but grow and advance in clusters.