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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
Dark Forest: Should We Not Contact Aliens?

Dark Forest: Should We Not Contact Aliens?

Season 10 Episode 3
14:12
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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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Anti-gravity and the True Nature of Dark Energy
12:04
Season 2 Episode 29
Anti-gravity and the True Nature of Dark Energy
We’ve come a long way in our understanding of dark energy.
What Does Dark Energy Really Do?
9:50
Season 2 Episode 28
What Does Dark Energy Really Do?
How does dark energy affect the universe's expansion?
Why the Universe Needs Dark Energy
9:33
Season 2 Episode 27
Why the Universe Needs Dark Energy
What's needed to determine the shape and geometry of our universe?
We Are Star Stuff
10:38
Season 2 Episode 24
We Are Star Stuff
Stars are our stellar alchemists.
Will Starshot's Insterstellar Journey Succeed?
8:51
Season 2 Episode 23
Will Starshot's Insterstellar Journey Succeed?
Starshot is an interstellar travel expedition unlike any other before it.
How Cosmic Inflation Flattened the Universe
10:17
Season 2 Episode 21
How Cosmic Inflation Flattened the Universe
The Big Bang Theory only gets us part of the way there.
Why is the Earth Round and the Milky Way Flat?
10:48
Season 2 Episode 20
Why is the Earth Round and the Milky Way Flat?
Our universe is not a very diverse place when it comes to shapes.
What’s Wrong With the Big Bang Theory?
9:56
Season 2 Episode 19
What’s Wrong With the Big Bang Theory?
We continue our search for a grand unifying theory of the Big Bang!
Why the Big Bang Definitely Happened
8:54
Season 2 Episode 18
Why the Big Bang Definitely Happened
The actual moment of ‘the Big Bang’ is still a bit of a grey area within physics.
Should We Build a Dyson Sphere?
10:14
Season 2 Episode 40
Should We Build a Dyson Sphere?
The Kepler telescope recently found a strange partial eclipse...possibly a Dyson Sphere.
How the Quantum Eraser Rewrites the Past
10:06
Season 2 Episode 39
How the Quantum Eraser Rewrites the Past
Causality is meant to move in one direction: forward.
LIGO's First Detection of Gravitational Waves!
7:29
Season 2 Episode 16
LIGO's First Detection of Gravitational Waves!
Gravitational waves have officially been detected by LIGO!
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