Join Jill and Liz as they answer the questions “Why do we yawn?” and “why does my voice sound different on a recording?” We also have a fact about a sailing stones and a cozy mystery recommendation you are sure to love! To submit your own question, go to KDL.org/Stump. We can’t wait to hear from you!   
Fact of the Day book: https://kdl.bibliocommons.com/v2/record/S174C1124561 
Liz Recomends: https://kdl.bibliocommons.com/v2/record/S174C1026388 
Regarding yawning... 
https://kids.frontiersin.org/articles/10.3389/frym.2017.00052 
https://my.clevelandclinic.org/health/body/yawning 
https://pmc.ncbi.nlm.nih.gov/articles/PMC3534187/#abstract1 
https://www.sleepfoundation.org/sleep-faqs/why-do-you-yawn  
https://www.webmd.com/sleep-disorders/what-to-know-about-yawning 
Animals yawning montage: https://www.youtube.com/watch?v=2oBimtQ1yY4 
Regarding hearing... 
https://youtu.be/uvosNz0Xq7g?si=rg49h7wtA4K1GCql 
https://school.eb.com/levels/high/article/human-ear/109529 
https://www.livescience.com/52287-ear-anatomy.html 
https://research.ebsco.com/c/5h4gt5/viewer/pdf/rgfnj35edn 
Beeghly, Kelsey. “Link to the Library of Congress Etching the Human Voice: Exploring the History of Sound Recording Technology.” Music Educators Journal, vol. 110, no. 3, Mar. 2024, pp. 13–15. EBSCOhost, https://doi.org/10.1177/00274321241237728. 
https://www.loc.gov/item/89714876/ 
https://time.com/5084599/first-recorded-sound/ 
 
 

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