'Much more violent than predicted': A chunk of the universe's missing matter was powerfully hurled out of galaxies

What has been confirmed

Only one source so far — nothing has been independently corroborated yet.

What remains unknown

• Reported by one source, not yet independently confirmed: The total amount of ordinary matter in our universe adds up to roughly one-tenth of what's expected.
• Reported by one source, not yet independently confirmed: Now, scientists think they may have found some of it between galaxies.