'Filament' Of Dark Matter Supports 'Bubbly' Universe Theory

Despite thousands of years of research, astronomers know next to nothing about how the universe is structured. One strong and accepted theory is that large galaxies are clustered together on structures similar to giant soap bubbles, with tinier galaxies sprinkled on the surface of this "soapy" layer. Astronomers have uncovered what they believe are visible traces of a "filament" of dark matter -- an entity on which galaxies meet, cluster and form. A filament can originate at the junction of two "soap bubbles," where the thin membrane is thicker.

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