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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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5:24
Are you breathing air molecules that were once exhaled by Caesar?
3:43
Chalk and seashells are made of the same stuff. So why is one crumbly and the other tough?
4:32
How does chemistry makes a cake donut and a yeast donut taste so different?
6:44
We visit St. James Cheese Company in New Orleans to learn about the chemistry of cheese.
4:22
Melatonin is a supplement that’s supposed to help you sleep. But does it work?
3:11
Airbags protect you in a car accident thanks to chemistry and a little bit of physics.
4:09
Pouring fuel over a flame can cause a ten-foot fireball to shoot out – flame jetting.
3:15
You can never buy fresh olives because of a bitter chemical called oleuropein.
3:58
There’s a sweet smell in the air after it rains: petrichor. How and why does this happen?