SciShow Space
The Invisible Gas That Gave Us Galaxies (2019x98)
Air date: Dec 10, 2019
More than half of all the matter in the universe is out in the dark, "empty space." Although it's basically invisible, the intergalactic medium has a lot to tell us about the stuff we can see.
- Premiered: Apr 2014
- Episodes: 878
- Followers: 1