A team of experts have discovered the oldest distribution of dark matter around galaxies roughly 12 billion years ago in the early stages of the universe. The team took advantage of the cosmic microwave background to be able to detect the unaccounted-for mass.
Astronomers used the cosmic microwave background, radiation left over from just after the Big Bang, to conduct the earliest ever detection of dark matter.
A new study uses a signal emitted shortly after the Big Bang, the cosmic microwave background, to explore how dark matter is distributed around ancient galaxies.