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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
Will This Pop a Balloon?

Will This Pop a Balloon?

Season 5 Episode 29
8:11
Can You Take Expired Drugs?

Can You Take Expired Drugs?

Season 5 Episode 30
3:25
How Plastic Recycling Actually Works

How Plastic Recycling Actually Works

Season 5 Episode 31
3:01
How Does Double Acting Baking Powder... Doubly Act?

How Does Double Acting Baking Powder... Doubly Act?

Season 5 Episode 32
2:23
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Reactions

How Seashells Are Made

Season 5 Episode 20

If you know that seashells are made of basically the same stuff as chalk, you might have wondered why chalk is crumbly but seashells are super tough. This week on Reactions, we explain: The secret’s in the biochemistry.
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