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Was the Milky Way a Quasar?

Season 6 Episode 12 | 13m 31s

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.

Aired: 04/13/20
Extras
Could sending a quantum twin across the galaxy make you both old and young at the same time?
It's possible that an event horizon is forming right behind and you won't know until its too late.
Are there no alien signals to find... or do we need to update how we search for them?
Physicists hope Planck stars can save us from black hole singularities and paradoxes.
Galaxies older than the universe? Webb's findings keep defying our best explanations.
Earth's core: solid or liquid? Yes — we know more about distant galaxies than our own interior.
Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself.
Tardigrades can survive almost anything—even most of Mars. But one Martian chemical stops even them.
The Higgs boson may open a portal to hidden particles that could explain dark matter.
The universe expands faster. “Dark energy” may not be constant after all.
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Could sending a quantum twin across the galaxy make you both old and young at the same time?
It's possible that an event horizon is forming right behind and you won't know until its too late.
Are there no alien signals to find... or do we need to update how we search for them?
Physicists hope Planck stars can save us from black hole singularities and paradoxes.
Galaxies older than the universe? Webb's findings keep defying our best explanations.
Earth's core: solid or liquid? Yes — we know more about distant galaxies than our own interior.
Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself.
Tardigrades can survive almost anything—even most of Mars. But one Martian chemical stops even them.
The Higgs boson may open a portal to hidden particles that could explain dark matter.
The universe expands faster. “Dark energy” may not be constant after all.