Skip to main content
Donate

Up Next

How Milk Becomes Cheese

How Milk Becomes Cheese

Season 5 Episode 17
6:44
Chameleons Are Masters of Nanotechnology

Chameleons Are Masters of Nanotechnology

Season 5 Episode 18
3:48
The Ultimate Donut Battle: Cake vs. Yeast

The Ultimate Donut Battle: Cake vs. Yeast

Season 5 Episode 19
4:32
How Seashells Are Made

How Seashells Are Made

Season 5 Episode 20
3:43
Are We Breathing Caesar's Last Breath

Are We Breathing Caesar's Last Breath

Season 5 Episode 21
5:24
How Do Hydrangeas Change Colors?

How Do Hydrangeas Change Colors?

Season 5 Episode 22
5:05
Surströmming: The Secrets of this Stinky Swedish Fish

Surströmming: The Secrets of this Stinky Swedish Fish

Season 5 Episode 23
7:54
Hydrangeas and the Science of Do-Overs

Hydrangeas and the Science of Do-Overs

Season 5 Episode 24
4:10
Why Does Stinky Cheese Stink?

Why Does Stinky Cheese Stink?

Season 5 Episode 25
4:57
3 Most Useful Kitchen Gadgets - Are They Worth It?

3 Most Useful Kitchen Gadgets - Are They Worth It?

Season 5 Episode 26
3:12
How Air Conditioning Works

How Air Conditioning Works

Season 5 Episode 27
4:23
Yellowstone and Their Steaming Acid Pools of Death

Yellowstone and Their Steaming Acid Pools of Death

Season 5 Episode 28
2:59
Back to Show
Reactions

Does Melatonin Do Anything?

Season 5 Episode 16

Melatonin is a supplement that’s supposed to help you sleep. But does it work? What’s the chemistry of this sleep aid? This week on Reactions, we go into the chemistry of melatonin and the realities of supplements.
Stream on your TV
Support Provided By
The Invisible Tsunami That Killed 1,500 People in One Night
11:28
Season 6 Episode 10
The Invisible Tsunami That Killed 1,500 People in One Night
We investigate how a lake could explode and shoot out a gigantic wave of deadly CO2.
The Terrifying (but Awesome) Science Behind Red Tides
11:39
Season 6 Episode 9
The Terrifying (but Awesome) Science Behind Red Tides
We dive into the science behind this somewhat terrifying, sometimes glowing phenomenon.
The Great MOLASSES Flood of 1919
12:52
Season 6 Episode 8
The Great MOLASSES Flood of 1919
We get into the science behind what created that 25 foot wave!
Challenger: The Real Story of an Avoidable Disaster
14:37
Season 6 Episode 7
Challenger: The Real Story of an Avoidable Disaster
We explain the science behind this tragic, avoidable accident.
The Loneliest Whale
15:21
Season 6 Episode 6
The Loneliest Whale
we bring you the story of the Loneliest Whale and other fascinating mammals.
The Ultimate Coffee Roasting Chemistry Throwdown
10:33
Season 6 Episode 5
The Ultimate Coffee Roasting Chemistry Throwdown
How hard could roasting beans at home really be?
You’re Using Disinfectants Wrong
6:11
Season 6 Episode 4
You’re Using Disinfectants Wrong
Doing these 3 things are critical.
How Does Tear Gas Work?
3:53
Season 6 Episode 3
How Does Tear Gas Work?
And did you know it's not actually a gas? We investigate.
We Surprised a Llama Antibody Researcher with a Llama
2:33
Season 6 Episode 2
We Surprised a Llama Antibody Researcher with a Llama
Scientists are considering some less-conventional approaches to tackle COVID-19.
Why Aren’t COVID Antibody Tests Better?
8:24
Season 6 Episode 1
Why Aren’t COVID Antibody Tests Better?
Learn how these tests work and why a test that’s 96% accurate is actually bad.
How Do Antiviral Drugs Work?
6:53
Season 5 Episode 99
How Do Antiviral Drugs Work?
We called a few virologists to find out.
The Early Plan to Fight COVID with the Polio Vaccine
5:26
Season 5 Episode 98
The Early Plan to Fight COVID with the Polio Vaccine
The COVID-19 pandemic has scientists considering a few less-conventional options.
Show more
Active loading indicator