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The reason humans get goosebumps – or, to be technical, experience horripilation – when scared is simple enough: perceived threats are met with a rush of adrenaline through the bloodstream, causing muscle contractions that make hairs stand on end. This made our much hairier ancestors appear larger to potential predators. But why does our skin react this way when we’re cold or when we’re moved by a song, a landscape or a painting? Or even when we drink lemon juice? This video from NPR’s Skunk Bear probes some of the evolutionary origins of our skin’s most mysterious adaptation.
Producers: Adam Cole, Ryan Kellman
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Earth science and climate
The only man permitted in Bhutan’s sacred mountains chronicles humanity’s impact
22 minutes
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Cosmology
The Indian astronomer whose innovative work on black holes was mocked at Cambridge
13 minutes
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The ancient world
An ancient Roman’s hilarious (and perhaps relatable) response to a social snub
2 minutes
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Love and friendship
After his son’s terrorist attack, Azdyne seeks healing – and his granddaughter
25 minutes
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Astronomy
Seven years later, what can we make of our first confirmed interstellar visitor?
59 minutes
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Physics
Is it possible to design a shape to roll along any fixed path?
4 minutes
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Art
More than breathtaking, ‘The Birth of Venus’ signalled an aesthetic revolution
19 minutes
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Biotechnology
The two women behind a world-changing scientific discovery
14 minutes
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Childhood and adolescence
Striking shadow puppetry illuminates a skater kid’s memories of Boy Scout camp
12 minutes