A rare, dusty galaxy that produces radio jets. - stock illustration

This artist's rendition illustrates a rare galaxy that is extremely dusty, and produces radio jets. Scientists suspect that these galaxies are created when two smaller galaxies merge. __A few billion years after the big bang, astronomers suspect that small galaxies across the universe regularly collided ? forcing the gas, dust, stars, and black holes within them to unite. The clashing of galactic gases was so powerful it ignited star formation, while fusing central black holes developed an insatiable appetite for gas and dust. With stellar nurseries and black holes hungry for galactic gas, a struggle ensued.