Some people are in great shape at the age of 90, while others are frail by 50. How people age isn't just down to how many years they've been alive, how they live has a massive impact. Smoking, drinking alcohol and eating bad food can make you look 10 years older and live 10 years less. It turns out that the same is true for star clusters!
Credit:
ESO, F. Ferraro (University of Bologna)