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Something You Should Know

Why You Wear Your Hair That Way & The Surprising Science of Human Stupidity

Something You Should Know

Mike Carruthers | OmniCastMedia

Science, Social Sciences, Self-improvement, Education, Health & Fitness

4.64K Ratings

🗓️ 4 September 2025

⏱️ 50 minutes

🧾️ Download transcript

Summary

When you stay at a short-term rental property such as Airbnb, you often notice security cameras. After all, it is someone’s home. But what about cameras inside the home? This episode begins with surprising data about just how common hidden surveillance is—and what every guest should know. Source: https://www.ipx1031.com/surveillance-rental-study/ For as long as humans have been around, we’ve had to do something with our hair. We’ve cut it, colored it, styled it—and hairstyles have come and gone through the centuries. But where do these trends really come from? Why do they say so much about who we are? And why are some styles (like the mullet, the pompadour, or “The Rachel”) so iconic? To answer these questions, I speak with Rachel Gibson, a hair historian who knows more about hair than anyone you’ll ever meet. She’s currently writing a book on the subject and shares fascinating content on her Instagram @thehairhistorian https://www.instagram.com/thehairhistorian/# People can be brilliant, but they can also be incredibly stupid—and sometimes in spectacular ways. Why do individuals, organizations, and even governments make such foolish choices? And what can we learn from it? My guest is Cezary Pietrasik, co-owner of Synerise (a global AI leader in predicting human behavior), former investment banker at JPMorgan, former consultant at McKinsey, and author of Homo Idioticus: Why We Are Stupid and What to Do About It (https://amzn.to/3Jqsa6D). He explains the psychology of stupidity and shares jaw-dropping examples you won’t forget. When people are sad, they often ruminate—rehashing negative thoughts over and over. It feels hard to stop, but there is something simple that helps break the cycle. Listen as I reveal what science says about how to stop rumination. Source: https://www.theatlantic.com/health/archive/2015/06/how-walking-in-nature-prevents-depression/397172/ PLEASE SUPPORT OUR SPONSORS!!! INDEED: Get a $75 sponsored job credit to get your jobs more visibility at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://Indeed.com/SOMETHING⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ right now! QUINCE: Keep it classic and cool this fall with long lasting staples from Quince! Go to ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://Quince.com/sysk⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ for free shipping on your order and 365 day returns! HERS: Whether you want to lose weight, grow thicker, fuller hair, or find relief for anxiety, Hers has you covered. Visit ⁠⁠⁠⁠⁠⁠⁠⁠https://forhers.com/something⁠⁠⁠⁠⁠⁠⁠⁠ to get a personalized, affordable plan that gets you! SHOPIFY: Shopify is the commerce platform for millions of businesses around the world! To start selling today, sign up for your $1 per month trial at⁠⁠⁠⁠⁠⁠⁠⁠⁠ https://Shopify.com/sysk⁠⁠⁠⁠⁠⁠⁠⁠⁠ Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

Click on a timestamp to play from that location

0:00.0

You know, a lot of the guests who appear on something you should know have their own TED Talk.

0:05.4

And did you know that TED has a podcast that drops a new TED Talk every day?

0:11.1

If you love hearing fascinating stories, insights about human behavior, and mind-blowing concepts that

0:18.3

weren't even on your radar before, I recommend you check out

0:21.9

TED Talks daily. You'll hear hot takes and deep dives from the world's leading thinkers, and learn

0:28.6

answers to questions like, how do I stop caring about what other people think, or is my partner

0:34.7

the one? Do aliens actually exist?

0:38.9

Don't miss out on your daily dose of inspiration.

0:42.1

Listen to TED Talks Daily wherever you get your podcast.

0:48.5

Today on something you should know, when you rent an Airbnb home, what are you supposed to do about those security cameras?

0:57.2

Then the story of human hair and hairstyles. The Bob, the Pixie, the Rachel, the Mullet.

1:04.5

The Mullet is such an bold haircut. There's nothing subtle about it. It's quite a strange

1:09.0

haircut, and it's a hybrid of long hair and short

1:12.4

hair, and that is why people have such strong reactions either way towards it. People either love

1:17.6

them or hate them. Also, how to stop ruminating, because it does you no good, and the science

1:23.3

of human stupidity, some wonderful examples of it and why we may be getting more stupid.

1:29.8

So since 1995, our IQ in the Western world is declining. So basically there's this research

1:35.8

from, I think, IBM, that frequent messaging and being bombarded by texts is decreasing our IQ

1:42.1

by 10 points. All this today on Something You Should Know.

1:47.0

Hi there, Fred Greenhalj here,

1:48.8

director of audio dramas like DC high-volume Batman and Star Trek Khan.

1:52.9

However, my one true love remains all things spooky,

...

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