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Is Time Travel Impossible?

Is Time Travel Impossible?

Season 5 Episode 37
12:33
Why We Might Be Alone in the Universe

Why We Might Be Alone in the Universe

Season 5 Episode 38
12:24
Does Life Need a Multiverse to Exist?

Does Life Need a Multiverse to Exist?

Season 5 Episode 39
13:09
Can You Observe a Typical Universe?

Can You Observe a Typical Universe?

Season 5 Episode 40
13:36
Is The Universe Finite?

Is The Universe Finite?

Season 5 Episode 41
12:25
The Doomsday Argument

The Doomsday Argument

Season 5 Episode 42
12:50
Do Black Holes Create New Universes?

Do Black Holes Create New Universes?

Season 5 Episode 43
12:24
How To Detect a Neutrino

How To Detect a Neutrino

Season 5 Episode 44
9:54
How To Capture Black Holes

How To Capture Black Holes

Season 5 Episode 45
12:02
What if Singularities DO NOT Exist?

What if Singularities DO NOT Exist?

Season 10 Episode 1
14:44
What Happens If We Nuke Space?

What Happens If We Nuke Space?

Season 10 Episode 2
15:13
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PBS Space Time

Loop Quantum Gravity Explained

Season 5 Episode 36

It’s time we talked about loop quantum gravity. What exactly is it? What are the loops? And can it really defeat string theory in our quest for a Theory of Everything?

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Season
There's Something Massive Hiding Behind the Galaxy's Strangest Star
15:15
A decade later, a leading theory may finally explain Tabby’s Star, the galaxy’s weirdest star.
We Thought All Black Holes Came From Stars. We May Have Been Wrong.
16:31
LIGO may have found an impossible black hole, hinting at primordial relics from the Big Bang.
The Universe Has Been Expanding Since the Big Bang. Just Not How We Thought.
17:40
DESI and DES studied dark energy. Together, what can they tell us?
The Quantum Experiment That Breaks Time
16:28
Could sending a quantum twin across the galaxy make you both old and young at the same time?
We Thought Black Holes Created Event Horizons. It Might Be the Opposite
17:39
It's possible that an event horizon is forming right behind and you won't know until its too late.
We’ve Been Looking for Aliens for 70 Years. We've Been Doing It Wrong All Along
20:48
Are there no alien signals to find... or do we need to update how we search for them?
We Thought Black Holes Ended in Singularities. They Might End In a Frozen Big Bang
14:27
Physicists hope Planck stars can save us from black hole singularities and paradoxes.
We Found Galaxies Too Old for the Universe
17:41
Galaxies older than the universe? Webb's findings keep defying our best explanations.
Earth’s Core Should Be Impossible. A New State of Matter Explains It.
16:16
Earth's core: solid or liquid? Yes — we know more about distant galaxies than our own interior.
Something Disturbing Happens When You Solve Einstein's Equations This Way
14:42
Gödel found a time-travel solution in General Relativity, revealing spacetime can loop on itself.
Martian Soil Is Deadly. And That's Why It Might Support Life
18:46
Tardigrades can survive almost anything—even most of Mars. But one Martian chemical stops even them.
Is the LHC Creating Dark Matter?
18:18
The Higgs boson may open a portal to hidden particles that could explain dark matter.
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