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Reactions is a show that uncovers the chemistry all around us. We answer the burning questions you’ve always wanted to ask, blending the worlds of science and every-day life.

Watch • 13:34
Reactions
Trying to Make Unbreakable Ice (Even Better Pykrete)
I tried to improve pykrete for months, then tossed it off a building.
Episode: S12 E3 | 13:34
Watch • 9:21
Reactions
I Made Leather Out of Eggs Because of Dinosaurs
Inspired by dinosaurs, Alex goes on a journey to stabilize collagen and create leather...with eggs.
Episode: S12 E2 | 9:21
Watch • 14:19
Reactions
They Changed Coke and Didn't Tell Anyone
George visits chemists and discovers that Mexican Coke is doing something secretive.
Episode: S12 E1 | 14:19
Watch • 14:20
PBS Space Time
JWST May Have Discovered a New Cosmic Object: The Black Hole Star
Gigantic black holes existed in a cosmic eyeblink after the Big Bang. That should be impossible.
Episode: S11 E35 | 14:20
Watch • 27:15
The Best of the Joy of Painting with Bob Ross
Majestic Pine
Bob Ross paints a golden field of sparse pines and other greenery.
Episode: S43 E4302 | 27:15
Watch • 26:07
The Best of the Joy of Painting with Bob Ross
Blue River
Bob Ross shows us how to create crimson-y magic in today's riverside landscape.
Episode: S43 E4301 | 26:07
Watch • 15:15
PBS Space Time
There's Something Massive Hiding Behind the Galaxy's Strangest Star
A decade later, a leading theory may finally explain Tabby’s Star, the galaxy’s weirdest star.
Episode: S11 E34 | 15:15
Watch • 16:31
PBS Space Time
We Thought All Black Holes Came From Stars. We May Have Been Wrong.
LIGO may have found an impossible black hole, hinting at primordial relics from the Big Bang.
Episode: S11 E33 | 16:31
Watch • 17:40
PBS Space Time
The Universe Has Been Expanding Since the Big Bang. Just Not How We Thought.
DESI and DES studied dark energy. Together, what can they tell us?
Episode: S11 E32 | 17:40