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Astronomy

The Role of Dark Matter in Seeding the First Galaxies

Quick fact

Dark matter's gravity acted as the seeds for the first galaxies; without its mass, the universe's matter would have been too spread out for galaxies to form within a billion years after the Big Bang.

Why this is interesting

Every galaxy we see today, including our own Milky Way, began as a tiny clump of invisible matter. How could something we can't see have shaped the entire universe so profoundly?