An international team of researchers has found dark matter dominating the halos of two supermassive black holes in galaxies roughly 13 billion light years away. Their study, published in The Astrophysical Journal,

The majority of our evidence for dark matter’s existence comes from observing visible (or baryonic) matter that does not exert enough gravitational force to explain why, say, an object is orbiting unusually fast or a galaxy is staying intact when it seems there is not enough mass to hold it together.

Researchers said on Thursday that they had discovered twin-lobed radio jets they suspect were formed when the universe was 1.2 billion years old, stretching at least twice the length of the Milky Way galaxy.