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Why Haven't We Found Alien Life?

Why Haven't We Found Alien Life?

Season 2 Episode 7
10:33
5 Ways to Stop a Killer Asteroid

5 Ways to Stop a Killer Asteroid

Season 2 Episode 8
8:31
How to Build a Blackhole

How to Build a Blackhole

Season 2 Episode 10
10:58
The Higgs Mechanism Explained

The Higgs Mechanism Explained

Season 2 Episode 11
7:49
The True Nature of Matter and Mass

The True Nature of Matter and Mass

Season 2 Episode 12
8:34
Juno to Reveal Jupiter's Violent Past

Juno to Reveal Jupiter's Violent Past

Season 2 Episode 35
10:15
The Future of Gravitational Waves

The Future of Gravitational Waves

Season 2 Episode 36
5:49
When Time Breaks Down

When Time Breaks Down

Season 2 Episode 13
8:04
The Origin of Matter and Time

The Origin of Matter and Time

Season 2 Episode 14
9:21
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PBS Space Time

Have Gravitational Waves Been Discovered?!?

Season 2 Episode 5

For the past 90 years, the predictions laid out Einstein's general theory of relativity have continued to be confirmed by experimental science. The last hold out is gravitational waves - the idea that certain gravitational events cause actual ripples in Spacetime. But have scientists done it?

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Season
Can a Particle Be Neither Matter Nor Force?
20:07
All particles belong to two large groups: fermions and bosons.
Will The Sun’s Magnetic Field Flip This Year?
16:11
Just how much stronger is this year’s solar activity going to get?
Is It Impossible To Cross The Event Horizon? | Black Hole Firewall Paradox
17:25
So you’ve decided to jump into a black hole...
What’s The Universe’s Strongest Particle Accelerator?
12:51
We only recently figured out where cosmic rays are coming from.
Can Black Holes Unify General Relativity & Quantum Mechanics?
13:28
Black hole complementarity may force us to rethink what it means to say that it exists.
Interstellar Expansion WITHOUT Faster Than Light Travel
20:15
To travel the stars without faster than light travel we’re going to need a generation ship.
What Happens If You Jump Into A Black Hole?
16:19
Today we are jumping into a black hole. Again.
Why Is The World Rushing Back To The Moon?
15:36
The Moon: humanity’s first destination beyond our atmosphere.
How Eclipses Revealed Our Solar System
15:07
So how did humans figure out the solar system? Eclipses!
What If Gravity is Not A Fundamental Force?
15:02
Is gravity just an emergent effect of entropy?
Does Space Emerge From A Holographic Boundary?
14:28
Is our 3-D universe is just the inward projection of an infinitely distant boundary?
Dark Forest: Should We Not Contact Aliens?
14:12
What if aliens are deliberately keeping quiet for fear that they might be destroyed?
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