Giant collision created galaxies devoid of dark matter

Origin of dark-matter-free galaxies traced. Two galaxies that are curiously lacking in dark matter - the most abundant matter in the Universe - might have formed when a collision between dwarf galaxies separated ordinary matter from its dark counterpart.

Automated summary

The origin of dark-matter-free galaxies has been traced back to a collision between dwarf galaxies, where ordinary matter separated from its dark counterpart.