The Universe Itself Might Be Hiding the Gravity Particle From Us

Gravitons, the particle of quantum gravity, may be impossible to detect.

The Universe Itself Might Be Hiding the Gravity Particle From Us PBS Space Time

Premiered January 13, 2026
The Universe Itself Might Be Hiding the Gravity Particle From Us

To progress to the next level in understanding reality, we need to combine quantum mechanics and Einstein’s general relativity. And to do that, most physicists believe we need a theory of quantum gravity which means we need gravitons.

About the Program

PBS Space Time

PBS Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth. Host Matt O'Dowd breaks down both the basic and incredibly complex sides of space and time.

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