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Season 5 Episode 17 | 15m 16s
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.
Aired: 05/14/19
How Black Holes Need Galaxies [NEEDS ASSETS]
It turns out black holes may be responsible for ending star formation across the galaxy.
Why Quantum Computing Requires Quantum Cryptography
Quantum computing is cool, but you know what would be extra awesome - a quantum internet.
No Dark Matter = Proof of Dark Matter?
We’ve been failing to detect dark matter for decades.
Now Showing
The Edge of an Infinite Universe
Have you ever asked “what is beyond the edge of the universe?”
Is Dark Energy Getting Stronger?
The power of Dark Energy may be increasing as the universe ages.
Secrets of the Cosmic Microwave Background
Secrets of the Cosmic Microwave Background
Perpetual Motion From Negative Mass?
Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples?
The hubble constant--the rate of expansion of our universe--has consumed astronomers.
![Video thumbnail: PBS Space Time How Black Holes Need Galaxies [NEEDS ASSETS]](https://image.pbs.org/video-assets/e72ZlZ9-asset-mezzanine-16x9-K523IRE.jpg?crop=1534x864&format=webp)
