Where does the smell of rain come from?
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Have you ever smelled a storm approaching? It’s Okay To Be Smart explains how you don’t have to check your phone to see if it’s about to rain, you can use your nose!
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The history of the barometer (and how it works)
A barometer is an instrument that measures air pressure, allowing weather forecasters and scientists to better predict extreme weather events. Despite its incredible usefulness, inventing the barometer was no walk in the park. Asaf Bar-Yosef describes the series of scientists and events that contributed to the birth of the barometer -- and explains how it actually works.
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Additional references
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A rose, a fresh cup of coffee, a wood fire. These are only three of the roughly 1 trillion scents that the human nose and brain are capable of distinguishing from each other, according to a new study. Researchers had previously estimated that humans could sense only about 10,000 odors but the number had never been explicitly tested before until now.
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TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.
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- Video created by Be Smart
- Lesson Plan created by Cynthia Silva
