Weekend Special: Guess What? Sweat Is Not Smelly! (So Why Do I Smell?) | WAMU 88.5 - American University Radio

NPR : News

Filed Under:

Weekend Special: Guess What? Sweat Is Not Smelly! (So Why Do I Smell?)

It's hot today. Really, really, hot; over a 100 degrees Fahrenheit hot, and so I'm sweating.

Sweating is what we people do to cool off, which is good. But sweating is also what makes me ... what's the word? Odoriferous. (Latinate for stinky, which is not so good.)

Here's my question: If I swipe a little sweat trickling down my leg and hold it to my nose, it smells fine. But if I take a swipe from my arm pit (or several other places I choose not to mention) it's very un-fine. Why the difference?

Why does sweat sometimes smell and sometimes not?

The answer comes from my Radiolab pal Josh Kurz (here working for Distillations, a chemistry podcast sponsored by Chemical Heritage magazine). In this very sweaty video, featuring a warmly clad Louis Pasteur, Josh discovers that sweat, when it's just plain sweat, doesn't smell. But sometimes sweat bonds with a particular group of proteins, and it's those proteins that smell, not the sweat. You'll see. Just hold your nose.


If you haven't sweated enough, last year cartoonist Lev Yilmaz and I teamed up on a cartoon video that asked, How Much Heat Can A Person Stand? We describe an experiment conducted by several British gentlemen 200 years ago and their very surprising discovery which, once again, was all about sweat. (And also involved a dog, an egg and a steak.) Josh Kurz's videos are part of a Distillation series called Blood, Sweat and Tears. He's doing a video about each.

Copyright 2012 National Public Radio. To see more, visit http://www.npr.org/.

NPR

Should Ray Rice Get A Second Chance? 'Maybe,' Parcells Says

In part two of David Greene's conversation with Bill Parcells, the legendary football coach discusses how he dealt with players' drug use, and redemption for the former Baltimore Raven running back.
NPR

Food Industry Drags Its Heels On Recyclable And Compostable Packaging

A new report from two environmental groups reviewed the recyclability and compostability of packaging from 47 food companies. It found few examples of companies that have prioritized waste reduction.
NPR

Former Democratic Sen. Jim Webb Explores Presidential Bid

In considering whether to launch a presidential campaign, former Senator Jim Webb of Virginia tells Steve Inskeep his big challenge would be raising money to promote his ideas.
NPR

Media Outlets Partner With Snapchat To Appeal To Younger Users

As people disappear from the audiences of conventional news organizations, 11 media outlets have partnered with Snapchat in the U.S. to offer its younger users easily digested fare within the app.

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.