Sunglasses have various special coatings: Some are reflective, while others are scratch-resistant. In this episode, Marshall explains how these different coatings work.
Yesterday
How Did Sundown Towns Say the Quiet Part Out Loud?
Sundown towns are places in the United States where, after the Civil War and Reconstruction, white communities kept Black Americans and other groups out for decades, on purpose. Learn how they came to be -- and how some sundown towns are in recovery -- in today's episode of Brain ... Show More
11m 36s
Aug 12
Why Do We Yawn, and Why Is It Catching?
Science isn't entirely sure why humans and other animals yawn, let alone why yawning can be contagious -- but we've got some good hypotheses. Learn about them, from cooling the brain to spreading alertness, in today's episode of BrainStuff, based on these articles: https://scienc ... Show More
12m 3s
May 2022
Harry Makes a Spectacle of Himself
More and more of us are in need of glasses these days and luckily, there is now a much more positive perception of people with “four eyes.” However, it wasn’t always that way. So where did the stereotypes come from, and is there a chance that people who wear glasses are smarter t ... Show More
34m 43s
<p>What goes into making a piece of tech waterproof? From cases to creative charging ports, we look at the challenges.</p><p> </p> Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a><p>See <a href="https://om ... Show More