An article published in the journal “Nature Astronomy” reports a study on the star cluster Palomar 5 that indicates that in a billion years only black holes will remain inside it. A team of researchers led by Professor Mark Gieles of the University of Barcelona studied this ancient and very low-density cluster by conducting a series of simulations to try to predict its future. The number of black holes inside it is already above average today and is subject to gravitational interactions with the consequence that in the distant future its size will increase and only black holes will remain.