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PBS Space Time
Are We Alone? Galactic Civilization Challenge
Season 2
Episode 45
The Drake Equation tells us the likelihood that there are other advanced technological civilizations waiting for us among the stars. In this episode of Space Time we challenge you to use the Drake Equation to help us determine how near or far these alien races may be.
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17:25
So you’ve decided to jump into a black hole...

12:51
We only recently figured out where cosmic rays are coming from.

13:28
Black hole complementarity may force us to rethink what it means to say that it exists.

20:15
To travel the stars without faster than light travel we’re going to need a generation ship.

16:19
Today we are jumping into a black hole. Again.

15:36
The Moon: humanity’s first destination beyond our atmosphere.

15:07
So how did humans figure out the solar system? Eclipses!

15:02
Is gravity just an emergent effect of entropy?

14:28
Is our 3-D universe is just the inward projection of an infinitely distant boundary?

14:12
What if aliens are deliberately keeping quiet for fear that they might be destroyed?

15:13
So what exactly is an EMP, and how dangerous are they?

14:44
The terrible singularity at the heart of the black hole may be no more.