An article published in “The Astrophysical Journal” reports the results of observations of the globular cluster M14. A team of astronomers led by Francesca D’Antona of the Italian National Institute of Astrophysics, Rome, used the Hubble Space Telescope to study M14, discovering that over a third of the stars in M14 contains an amount of helium never observed outside globular clusters, as it has peaks higher than 30% of their mass. According to the researchers, the most likely explanation is that these are second-generation stars that swallowed the helium ejected by first-generation stars during their agony.