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PBS Space Time
The Edge of an Infinite Universe
Season 5
Episode 17
Have you ever asked “what is beyond the edge of the universe?” And have you ever been told that an infinite universe that has no edge? You were told wrong. In a sense. We can define a boundary to an infinite universe, at least mathematically. And it turns out that boundary may be as real or even more real than the universe it contains.
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12:36
We explore how a black hole manages to communicate its gravitational force.
12:26
We explore the possibility of building a universe and all the limitations it presents.
14:14
Let’s learn how to cheat the universe.
14:28
Time to update you on the hunt for galactic empires.
13:29
This is what happens if microscopic primordial black holes could actually hit Earth.
14:07
Black holes of string theory - fuzzballs - are perhaps even weirder than the regular type.
14:28
We learn more about Modified Newtonian Dynamics aka MOND.
14:28
ACTION is the concept in physics that may be more fundamental than energy and entropy.
11:41
Constructor Theory is the ability to see the deepest underlying facts about the world.
13:00
New efforts in quantum tunneling show that superluminal motion may be possible.
14:15
The idea of magnetic monopoles remains one of physics’ most tantalizing maybes.
15:10
The fact is that all electrons are the same as each other and the object is what changes.