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PBS Space Time

Will the Universe Expand Forever?

Season 2 Episode 26

Throughout history, there has been much speculation about what the fate of the universe would be. Many theorized that the universe would eventually succumb to the pull of gravity, and reverse its expansion in what was being called ‘The Big Crunch.’ However, with the help of mathematical equations from Newton, Einstein, and Alexander Friedmann, we now have an answer.

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Season
What If Space is Not Empty?
14:59
Spacetime on its smallest scale is an ocean of black holes and wormholes...or so we think.
Did JWST Discover Dark Matter Stars?
11:49
Did JWST just find a new type of star powered by dark matter?
Do We Need a New Dark Matter Model?
16:21
Did we just uncover new evidence to support Cold Dark Matter?
Was the Gravitational Wave Background Finally Discovered?!?
15:51
The gravitational wave background has probably been detected using a pulsar timing array.
What If The Speed of Light is Not Constant?
15:05
Let’s explore how constant this speed of light fundamental constant really is.
Does Axionic Dark Matter Bind Galaxies Together?
14:39
Dark matter may be a quantum mechanical wave that literally holds galaxies together.
Did AI Prove Our Proton Model Wrong?
16:24
Has AI proven that the proton is made of 5 quarks rather than 3 quarks?
What Supernova Distance Would Trigger Mass Extinction?
15:16
How close is too close for supernova explosions?
Could We Move Planet Earth Across the Universe?
12:14
Could we turn our solar system into a spaceship and drive the Sun around the galaxy?
Is 'Perpetual Motion' Possible with Superfluids?
16:00
If we want to see quantum weirdness with our eyes, we’ll need Bose-Einstein Condensates.
Could LIGO Find Massive Alien Spaceships?
16:42
Could LIGO find alien spacecraft accelerating to near light speed?
Fermions Vs. Bosons Explained with Statistical Mechanics!
15:51
How can we tell the difference between fermions & bosons? Statistical Mechanics!
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