Stop signs were always the red octagons we know today -- so how was the color chosen, and why has it stuck? Learn about the history and psychology of red traffic signals in this classic episode of BrainStuff.

Stop signs were always the red octagons we know today -- so how was the color chosen, and why has it stuck? Learn about the history and psychology of red traffic signals in this classic episode of BrainStuff.

Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

BrainStuff

BrainStuff Classics: Why Are Stop Signs Red?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/b8d33d1d-c5e4-4c20-8359-b0fc01611ae0/transcript

The tradition of putting diamonds on engagement rings is less than a century old, but some 80% of engagement rings in the U.S. now bear them. Learn how a cartel and an ad campaign created such a pervasive demand for diamonds in today's episode of BrainStuff, based on this article: https://money.howstuffworks.com/true-story-blood-diamonds.htm and this video: https://www.youtube.com/watch?v=IceJ-gUm-gQ. To learn more about the De Beers cartel, check out the episode of Stuff They Don't Want You To Know 'Diamonds: The Conspiracy' https://omny.fm/shows/stuff-they-dont-want-you-to-know/diamonds-the-conspiracy

The tradition of putting diamonds on engagement rings is less than a century old, but some 80% of engagement rings in the U.S. now bear them. Learn how a cartel and an ad campaign created such a pervasive demand for diamonds in today's episode of BrainStuff, based on this article: <a href="https://money.howstuffworks.com/true-story-blood-diamonds.htm">https://money.howstuffworks.com/true-story-blood-diamonds.htm</a> and this video: <a href="https://www.youtube.com/watch?v=IceJ-gUm-gQ">https://www.youtube.com/watch?v=IceJ-gUm-gQ</a>. To learn more about the De Beers cartel, check out the episode of Stuff They Don't Want You To Know 'Diamonds: The Conspiracy' <a href="https://omny.fm/shows/stuff-they-dont-want-you-to-know/diamonds-the-conspiracy">https://omny.fm/shows/stuff-they-dont-want-you-to-know/diamonds-the-conspiracy</a>

Why Do We Put Diamonds on Engagement Rings?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/2eb1f7f0-c727-4a26-ae30-b4750134995a/transcript

The police raid and ensuing riots at the Stonewall Inn in June of 1969 became a turning point in queer civil rights because of the larger movement that coalesced around it. Learn about its place in LGBTQIA history in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-events/stonewall-riots.htm

The police raid and ensuing riots at the Stonewall Inn in June of 1969 became a turning point in queer civil rights because of the larger movement that coalesced around it. Learn about its place in LGBTQIA history in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-events/stonewall-riots.htm

How Did the Stonewall Riots Work?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/f2020ba2-df0d-4ba0-9367-b47501349955/transcript

Tarsiers are our palm-sized primate cousins that evolved in the forests of Southeast Asia to have long limbs and huge, round eyes. Learn how we've learned about them in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/tarsier.htm

Tarsiers are our palm-sized primate cousins that evolved in the forests of Southeast Asia to have long limbs and huge, round eyes. Learn how we've learned about them in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/tarsier.htm

How Did the Smallest Primates Get Such Big Eyes?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/1295d364-6e4a-497a-8251-b4730105bb91/transcript

BrainStuff Classics: Why Are Stop Signs Red?

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