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SUNDAY SCIENCE: THE GRAVITY PARTICLE SHOULD EXIST. SO WHERE IS IT?  
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Matthew John O'Dowd
November 13, 2025
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_ Explore the elusive graviton, a potential quantum particle of
gravity. This video investigates its existence and role in unifying
physics' two major theories. Learn how physicists attempt to quantize
gravity, despite significant challenges. _

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_MATTHEW JOHN O'DOWD is an Australian astrophysicist. He is an
associate professor in the Physics and Astronomy Department at the
Lehman College of the City University of New York and the writer and
host of PBS Space Time._

_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 with our astrophysicist host: Matthew
O’Dowd._

For all business inquiries and sponsorship opportunities please reach
out to: [email protected]

Matt O'Dowd spends his time studying the universe, especially really
far-away things like quasars, super-massive black holes, and evolving
galaxies. He uses telescopes in space to do it. Matt completed his
Ph.D. at NASA's Space Telescope Science Institute, followed by work at
the University of Melbourne and Columbia University. He's now a
professor at the City University of New York's Lehman College and an
Associate at the American Museum of Natural History's Hayden
Planetarium.

Previous host Gabe Perez-Giz is an astrophysicist who studies black
hole physics. He received his Ph.D. from Columbia University and also
hosted PBS Infinite Series.

COVID VACCINES MAY INCREASE THE LIFESPAN OF CANCER PATIENTS – THIS
COULD BE A GAME CHANGER
[[link removed]]DEVI
SRIDHARGUARDIANA study suggesting mRNA vaccines help the body fight
malignant cells raises the tantalising prospect of a low-cost,
low-risk treatment that could help with all cancersNovember 12, 2025

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* physics
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* quantum mechanics
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* gravity
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