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Our Only Chance To Finally Unlock The Gravity Particle

Season 11 Episode 21 | 16m 26s

Physicists have long believed that detecting the particle of gravity—the graviton—was fundamentally impossible, with the universe itself seeming to block every direct attempt. This episode explores a new generation of clever experiments that may finally let us detect gravity’s particle, and why even succeeding wouldn’t quite mean what we think it does.

Aired: 02/04/26
The universe thrums with quantum fields, except something may be missing: the sterile neutrino.
Gravitons, the particle of quantum gravity, may be impossible to detect.
2025 was the international year of quantum science, but today we examine its origins.
We’ve found lots of “habitable” worlds but we don’t know what factors are needed for life.
What is the graviton, and does it even exist?
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.