What matters to you.
0:00
0:00
NEXT UP:

The Missing Mass Mystery

Season 3 Episode 45

About the Episode

For years, astronomers have been unable to find up to half of the baryonic matter in the universe. We may just have solved this problem.

Aired: 10/24/17 | Expires: | Runtime: 11m 02s
Support for GBH is provided by: