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PBS Space Time
How Much Information is in the Universe?
Season 4
Episode 39
Billions of galaxies, each with billions of stars, each with … rather a lot of particles in them. And then there's dark matter, black holes, planets, and the particles and radiation in between the stars and galaxies. But… is the universe actually made of stuff? An increasing number of physicists view the universe – view reality as informational at its most fundamental level.
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Are there no alien signals to find... or do we need to update how we search for them?
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17:41
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16:16
Earth's core: solid or liquid? Yes — we know more about distant galaxies than our own interior.
14:42
Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself.
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18:18
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19:02
The universe expands faster. “Dark energy” may not be constant after all.
16:26
There’s a new generation of experiments that may unlock the gravity particle.
18:33
The universe thrums with quantum fields, except something may be missing: the sterile neutrino.