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PBS Space Time
Was the Milky Way a Quasar?
Season 6
Episode 12
The Milky Way galaxy is relatively calm by the destructive standards of the rest of the Universe, and compared to its own very violent past. But just recently we discovered that its violent past was much more recent than we thought - and could even happen again.
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18:33
The universe thrums with quantum fields, except something may be missing: the sterile neutrino.
18:42
Gravitons, the particle of quantum gravity, may be impossible to detect.
25:02
2025 was the international year of quantum science, but today we examine its origins.
21:17
We’ve found lots of “habitable” worlds but we don’t know what factors are needed for life.
21:31
What is the graviton, and does it even exist?
19:52
Antimatter drives sound like science fiction, but they may not be as far as you think.
23:22
Does quantum mechanics allow the future to retroactively influence the past or not?
19:14
Life on mars could result in humanity’s destruction via Fermi Paradox.
19:01
How to build a particle collider the size of the solar system.
12:39
One of the most important reasons we go to space is to know our own planet better.
16:18
Is there evidence for the existence of an enormous number of other universes?
17:14
Can something that exists be bad science?