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How to Signal Aliens

How to Signal Aliens

Season 1 Episode 18
6:14
Can a Circle Be a Straight Line?

Can a Circle Be a Straight Line?

Season 1 Episode 20
8:16
The Leap Second Explained

The Leap Second Explained

Season 1 Episode 21
2:20
Can You Trust Your Eyes in Spacetime?

Can You Trust Your Eyes in Spacetime?

Season 1 Episode 22
9:23
Do Events Inside Black Holes Happen?

Do Events Inside Black Holes Happen?

Season 1 Episode 25
11:50
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

Is Gravity An Illusion?

Season 1 Episode 17

Most of us take gravity as an assumed part of our living realities, but why? Basic physics introduces us to the concept of gravity from a Newtonian sense, but when you start factoring Einstein into an understanding of gravity, things get… weird. For example, gravity may simply not exist. Why? Watch this week’s episode of PBS Space Time and find out why gravity may be an illusion!

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Season
Hacking the Nature of Reality
13:34
An insight by a young scientist in 1925 allowed us a better understanding of space time.
Solving the Three Body Problem
13:35
The three body problem is famous for being impossible to solve.
How To Capture Black Holes
12:02
How about black holes being captured by the screaming vortex of a quasar?
How To Detect a Neutrino
9:54
Why is there something rather than nothing?
Do Black Holes Create New Universes?
12:24
Do black holes create new universes?
The Doomsday Argument
12:50
A simple statistical argument tells us that the doom of our species is much, much closer.
Is The Universe Finite?
12:25
Our universe may actually be finite in size.
Can You Observe a Typical Universe?
13:36
How do you correctly use the anthropic principle?
Does Life Need a Multiverse to Exist?
13:09
Does life need a multiverse to exist?
Why We Might Be Alone in the Universe
12:24
Why does it appear, that humanity is the lone intelligence in the universe?
Is Time Travel Impossible?
12:33
Is Time Travel Impossible?
Loop Quantum Gravity Explained
13:49
What exactly is it?
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