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PBS Space Time

The Strange Universe of Gravitational Lensing

In the world of our mind’s eye, light travels in a straight line. In reality, spacetime is deflected and magnified through the lens of gravity. Find out how this works and what it allows us to learn about our universe in this episode of Space Time.

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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?
What Happens If We Nuke Space?
15:13
So what exactly is an EMP, and how dangerous are they?
What if Singularities DO NOT Exist?
14:44
The terrible singularity at the heart of the black hole may be no more.
Did JWST Solve The Mystery of Supermassive Black Hole Origin
14:33
We may have solved the mysterious origins of supermassive black holes in our universe.
Does Antimatter Create Anti-Gravity?
16:30
Does antimatter fall down, or does it fall up?
Can The Crisis in Cosmology Be Solved With Cosmic Voids?
14:29
Could cosmic voids be driving the universe?
What If There's A Black Hole Inside The Sun?
17:53
Is there a black hole hiding in the core of the Sun eating it from the inside out?
What if Humans Are Not Earth's First Civilization?
19:19
What if we aren't the first technological civilization on Earth?
Does Many Worlds Explain Quantum Probabilities?
19:03
Many World’s lack wavefunction collapse might be the key to the measurement problem.
What If Gravity is Not Quantum?
18:32
The holy grail of physics is a quantum theory of gravity. What if it’s not possible?
How Will We (Most Likely) Discover Alien Life?
18:32
Alien life will most likely be discovered by faint changes in the color of alien sunsets.
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