There's a lot of natural variation in the color of human hair. What's the physical explanation for the difference?
Feb 2025
Where Did Curly Hair Come From? Biological Anthropology May Provide Insights
It’s fairly strange that humans, unlike many other mammals, don’t have hair all over. Our lack of body hair and wide geographic distribution led to the variation of sun-protective melanin in our skin. For the hair that remains, why did some groups develop curls while others did n ... Show More
18m 46s
Feb 2025
Where Did Curly Hair Come From? Biological Anthropology May Provide Insights
It’s fairly strange that humans, unlike many other mammals, don’t have hair all over. Our lack of body hair and wide geographic distribution led to the variation of sun-protective melanin in our skin. For the hair that remains, why did some groups develop curls while others did n ... Show More
18m 46s
Aug 2022
How to transition to natural hair — and learn to love it
For many Black people, transitioning to natural hair can feel frustrating, especially if you're doing it for the first time. Experts share what you need to know about growing out natural hair, from washing it and styling it – to learning to love it. See pcm.adswizz.com for inform ... Show More
21m 26s
Aug 2025
Ep115 "What is color? Part 1: Why hunters wear orange"
Why do birds and bees choose different flowers? Why do mammals' eyes seem to be optimized for moving around at night, and what does that have to do with hairless humans getting angry? What does any of this have to do with road signs, camouflage, mantis shrimp, the sun, the dress ... Show More
37m 36s
Jan 2025
How science can help us tackle racism
Most of us like to think we live in an equal society that offers the same opportunities to all. But unfortunately, hundreds of scientific studies say otherwise. Racial bias is essentially everywhere, often hiding in plain sight.
For example, did you know that black people are as ... Show More
40m 58s
Jun 2022
59: Why Ancient People Didn't See the Color Blue
Here's a philosophical question for you. If a color doesn't have a name, can we still see it? Many years ago, the human eye evolved to give us the ability to see about a million colors. That's a lot. Then how come, until very recently, nobody saw or even heard of the color blue? ... Show More
15m 28s