Learn about glow-in-the-dark cities; why holes feel larger with a tongue than a finger; and the maximum volume on Earth.

Maybe we can save the planet by making our cities glow in the dark by Briana Brownell

• Kleiner, K. (2021, November). Will glow-in-the-dark materials someday light our cities? Knowable Magazine | Annual Reviews. https://knowablemagazine.org/article/technology/2021/will-glow-in-the-dark-materials-someday-light-our-cities
• Long Persistent Luminescence: A Road Map Toward Promising Future Developments in Energy and Environmental Science. (2021). Annual Review of Materials Research. https://www.annualreviews.org/doi/10.1146/annurev-matsci-091520-011838

Why holes feel larger with your tongue than with your finger by Grant Currin

• Why Do Holes Feel Larger With Your Tongue Than With Your Finger? (2017, November). Mentalfloss.com. https://www.mentalfloss.com/article/512813/why-do-holes-feel-larger-your-tongue-your-finger
• Seriously Science. (2017, October 18). Scientist finally figures out why holes feel larger with your tongue than with your finger. Discover Magazine; Discover Magazine. https://www.discovermagazine.com/health/scientist-finally-figures-out-why-holes-feel-larger-with-your-tongue-than-with-your-finger#.Wfn2exNSzm1
• Albashaireh, Z. S. M., & Orchardson, R. (1988). Comparison of the human perception of hole size by the tongue and the fingers. Archives of Oral Biology, 33(3), 183–185. https://doi.org/10.1016/0003-9969(88)90043-x
• Wilkins, A. (2010, December 28). Why our tongues and fingers “see” the world differently. Gizmodo; Gizmodo. https://gizmodo.com/why-our-tongues-and-fingers-see-the-world-differently-5719827
• Drewing, K. (2018). The extent of skin bending rather than action possibilities explains why holes feel larger with the tongue than with the finger. Journal of Experimental Psychology: Human Perception and Performance, 44(4), 535–550. https://doi.org/10.1037/xhp0000453
• S2E5: Head Transplants - Taboo Science Podcast. (2021). Tabooscience.show. https://www.tabooscience.show/s2e5-head-transplants/

There's a maximum sound volume on Earth by Cameron Duke

• EarQ. (2021). What Are Decibels (dB)? | Loudness Levels, Safe, Unsafe. Earq.com. https://www.earq.com/hearing-health/decibels
• Hearing loss and deafness: Normal hearing and impaired hearing. (2017, November 30). Nih.gov; Institute for Quality and Efficiency in Health Care (IQWiG). https://www.ncbi.nlm.nih.gov/books/NBK390300/
• Koerth, M. (2016, July 7). The Loudest Sound In The World Would Kill You On The Spot. FiveThirtyEight; FiveThirtyEight. https://fivethirtyeight.com/features/the-loudest-sound-in-the-world-would-kill-you-on-the-spot/
• Kolitz, D. (2019, January 14). What’s the Loudest Sound in the Universe? Gizmodo; Gizmodo. https://gizmodo.com/whats-the-loudest-sound-in-the-universe-1831720066
• Mihai Andrei. (2020, February 4). The loudest sound in mankind’s history. ZME Science; ZME Science. https://www.zmescience.com/science/the-loudest-sound-ever-in-mankinds-history/

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