98.6 degrees is hot. If it were that hot outside, you’d be sweaty and want to go jump in a nice cold pool. But the insides of our bodies are that hot all the time! And that’s because there’s a lot going on in there that creates heat.

In this episode, Molly and co-host Saathvik find out how our bodies keep our insides at a nice steady temperature (and why that’s harder to do when it’s hot outside!). And we’ll talk with Dr. Joe Alcock about why humans and lots of other animals get fevers. Plus, a new mystery sound guaranteed to make you sweat!

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Today’s episode is sponsored by:
- Poshpeanut.com/brainson - Receive 20% off your first order
- Indeed.com/brainson - Receive a $75 sponsored job credit with code brainson
- Inside Out 2 - Disney and Pixar's Inside Out 2 is coming to theaters, June 14th
- PRX's Jamming on the Job - Check out new episodes of PRX's Jamming on the Job wherever you get your podcasts.
- Mrs. Wordsmith - Visit mrswordsmith.com and use code brainson15 to get 15% off your order.