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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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Season
Quantum Vortices and Superconductivity + Challenge Answers
9:02
Scientists studying quantum vortices and their impact on superconductivity just won the No
The Many Worlds of the Quantum Multiverse
11:10
Is our universe a definitive single reality or is it merely one within an infinite multive
The First Humans On Mars
6:18
Elon Musk’s SpaceX program proposes that 100 people could be sent to colonize Mars within
Are We Alone? Galactic Civilization Challenge
6:19
Everything we’ve learned about our universe tells us that it is very unlikely we are alone
Life on Europa?
9:33
New findings have increased the likelihood that there is a vast ocean lying under Europa.
Self-Replicating Robots and Galactic Domination
9:48
We’ll soon be capable of building self-replicating robots.
Is There a Fifth Fundamental Force? + Quantum Eraser Answer
8:21
Has a fifth fundamental force been discovered and how will this effect our understanding o
Is Quantum Tunneling Faster than Light?
9:52
Dive into the bizarre phenomenon
Is an Ice Age Coming?
12:10
Matt looks at how the changes in our planet’s orbit and rotation impacts our climate.
Anti-gravity and the True Nature of Dark Energy
12:04
We’ve come a long way in our understanding of dark energy.
What Does Dark Energy Really Do?
9:50
How does dark energy affect the universe's expansion?
Why the Universe Needs Dark Energy
9:33
What's needed to determine the shape and geometry of our universe?
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