Scientists think they know where the early universe’s dark matter has been hiding

Most of the mass in the universe is made up of a kind of matter that none of us have ever seen. It's called "dark matter" and, despite being incredibly abundant, it's also extremely difficult to study. Decades-old calculations suggested that there is more dark matter around younger galaxies than the ancient ones from the early days of the universe, but then where did the dark matter we see today come from? A new study offers the answer.Past research suggested that galaxies we see nearby have mor