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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.

Watch • 18:42
PBS Space Time
The Universe Itself Might Be Hiding the Gravity Particle From Us
Gravitons, the particle of quantum gravity, may be impossible to detect.
Episode: S11 E19 | 18:42
Watch • 1:38:18
PBS Space Time
Black Holes. Explained. For 1.5 Hours.
We go in depth on black holes: the strangest objects in the universe!
Special: 1:38:18
Watch • 25:02
PBS Space Time
Heisenberg Made a Discovery in 1925. We Still Can't Explain It
2025 was the international year of quantum science, but today we examine its origins.
Episode: S11 E18 | 25:02
Watch • 26:48
The Best of the Joy of Painting with Bob Ross
Desert Glow
Bob Ross takes viewers into the incredible beauty of the desert.
Episode: S42 E4224 | 26:48
Watch • 10:27
Eons
When a Tiny Land Bridge Triggered an Ice Age
Understanding the Isthmus of Panama.
Episode: S8 E8 | 10:27
Watch • 9:07
Eons
What Was Greenland Like When it Was Green
How we might borrow genes from that ancient past of Greenland to help us adapt to the future.
Episode: S8 E7 | 9:07
Watch • 21:17
PBS Space Time
Do We Live in the Rarest Solar System In The Universe? We're about to find out!
We’ve found lots of “habitable” worlds but we don’t know what factors are needed for life.
Episode: S11 E17 | 21:17
Watch • 21:31
PBS Space Time
The Gravity Particle Should Exist. So Where Is It?
What is the graviton, and does it even exist?
Episode: S11 E16 | 21:31
Watch • 8:34
Reactions
I Used DNA to Fireproof Fabrics
We test if DNA from strawberries and salmon can really make fabric flame resistant.
Episode: S11 E12 | 8:34