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The Gravity Particle Should Exist. So Where Is It?

Season 11 Episode 16 | 21m 31s

Physics is this close to understanding the entire universe. And what lives in this gap? Many physicists think it’s the elusive graviton—the quantum particle of gravity—whose discovery will finally allow us to stitch together our two great theories of nature into a single master theory. But what is the graviton, and does it even exist?

Aired: 11/12/25
We’ve found lots of “habitable” worlds but we don’t know what factors are needed for life.
Antimatter drives sound like science fiction, but they may not be as far as you think.
Does quantum mechanics allow the future to retroactively influence the past or not?
Life on mars could result in humanity’s destruction via Fermi Paradox.
Is there evidence for the existence of an enormous number of other universes?
How to build a particle collider the size of the solar system.
One of the most important reasons we go to space is to know our own planet better.
Can something that exists be bad science?
It may be that our very DNA inherited its twist from the underlying handedness of reality.
Did God have any choice in creating the world? So asked Albert Einstein