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PBS Space Time

The Strange Universe of Gravitational Lensing

Season 2 Episode 33

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
Hacking the Nature of Reality
13:34
An insight by a young scientist in 1925 allowed us a better understanding of space time.
Solving the Three Body Problem
13:35
The three body problem is famous for being impossible to solve.
How To Capture Black Holes
12:02
How about black holes being captured by the screaming vortex of a quasar?
How To Detect a Neutrino
9:54
Why is there something rather than nothing?
Do Black Holes Create New Universes?
12:24
Do black holes create new universes?
The Doomsday Argument
12:50
A simple statistical argument tells us that the doom of our species is much, much closer.
Is The Universe Finite?
12:25
Our universe may actually be finite in size.
Can You Observe a Typical Universe?
13:36
How do you correctly use the anthropic principle?
Does Life Need a Multiverse to Exist?
13:09
Does life need a multiverse to exist?
Why We Might Be Alone in the Universe
12:24
Why does it appear, that humanity is the lone intelligence in the universe?
Is Time Travel Impossible?
12:33
Is Time Travel Impossible?
Loop Quantum Gravity Explained
13:49
What exactly is it?
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