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PBS Space Time

Will the Universe Expand Forever?

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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Why the Muon g-2 Results Are So Exciting!
12:35
Muon G-2 experiment produces the most successful predictions in physics.
Zeno's Paradox & The Quantum Zeno Effect
12:48
We talk about some real experiments that claim to have demonstrated Zeno's phenomenon.
The New Crisis in Cosmology
13:08
The crisis in cosmology has actually gotten worse, which means we may be onto something!
How Does Gravity Affect Light?
13:24
We explore if there is a true connection between light and gravity.
Does Time Cause Gravity?
8:55
We explore that it's the warping of time that causes gravity.
Gravitational Wave Background Discovered?
13:54
There's a galaxy-spanning gravitational wave detector that has provided a breakthrough.
Is Dark Matter Made of Particles?
13:03
We try to make contact with dark matter particles and enter into the Dark Universe.
Can We Break the Universe?
12:32
We delve into some of the most famous paradoxes of special relativity.
What Happens During a Quantum Jump?
12:43
Transitions of quantum systems have always defied observation...until now.
Navigating with Quantum Entanglement
12:11
Erwin Schrödinger provides a new perspective that helps us navigate quantum mechanics.
The Supernova At The End of Time
12:12
This is a new type of supernova that can only happen at the end of the universe.
Why Do You Remember The Past But Not The Future?
12:07
Why do we remember the past and not the future?
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