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How Does Sunscreen Work?
Season 7
Episode 14
Does slathering on sunscreen do anything beyond preventing a sunburn? Can it actually stop us from getting wrinkles or skin cancer?
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2:52
Clothing makers are harnessing the power of silver to combat workout stink. Does it work?
2:23
Why does baking powder say “double acting” on the container?
3:25
Every medicine you buy has a printed expiration date, but does it actually go bad?
2:59
Yellowstone's hot springs are the most dangerous and here's why.
4:23
Air conditioning is the science of heat transfer and the chemistry of refrigerants.
3:12
Do you really need all those kitchen gadgets? It all depends on the chemistry of cooking.
4:57
It’s the chemistry of washed-rind cheeses that makes these foods so awfully stinky.
4:10
We tried to use chemistry to change hydrangea flowers from red to blue. Let's try again.
7:54
Surstromming, Swedish for sour herring, has a powerful stink thanks to food preservation.