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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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How An Extreme New Star Could Change All Cosmology
14:30
A newly discovered white dwarf may change our understanding of all cosmology.
How Magnetism Shapes The Universe
13:26
We explore the range and distance magnetism can take us.
Where Are The Worlds In Many Worlds?
12:50
Where are the worlds of all the times the universe has split?
Electrons Do Not Spin
14:05
Although elusive, the quantum spin has led to some of the deepest insights we now know.
How Quantum Entanglement Creates Entropy
14:01
Entropy is behind one of the most fundamental laws of physics.
Can Space Be Infinitely Divided?
12:22
The more time and space are divided, the distance between them may not exist.
Are We Running Out of Space Above Earth?
13:44
The accumulation of space junk increases collisions known as the Kessler Syndrome.
What If Tiny Black Holes Are Everywhere?
11:34
If Planck relics are real, then the black holes may just be everywhere.
Breaking The Heisenberg Uncertainty Principle
10:48
Quantum mechanics forbids us from measuring the universe. But we try with this principle.
How To Know If It's Aliens
14:08
We examine all the best-case scenarios for life beyond Earth.
The New Warp Drive Possibilities
13:11
Einstein gives us a glimmer of hope that time can be warped.
What If Dark Matter Is Just Black Holes?
12:35
It may be that for every star in the universe there are billions of black holes.
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