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Yellowstone’s reintroduction of wolves in 1995 is one of the best-known instances of a trophic cascade – a single change in a food chain that transforms an entire ecosystem. The return of the wolves rejuvenated wildlife in the park from top to bottom, even changing the area’s physical geography as native animals and plants reasserted themselves. Narrated by George Monbiot, How Wolves Change Rivers chronicles how Yellowstone’s extraordinary success in rewilding stems from a decrease in invasive and overpopulated species such as coyote and deer thanks to just 66 wolves returning after a 70-year absence from the park.
Video by Sustainable Human
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Art
What does an AI make of what it sees in a contemporary art museum?
15 minutes
video
Fairness and equality
How the first woman of colour to be elected to the US Congress remade education
21 minutes
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History of ideas
Tantra is, and was, a subversive philosophy of feminine power
19 minutes
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Rituals and celebrations
From roaring fire and molten glass an artist creates a healing ritual
13 minutes
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Ecology and environmental sciences
Producing food while restoring the planet – a glimpse of farming in the future
7 minutes
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Archaeology
Ancient Greek sculptures were colourful. Why does the white marble ideal persist?
6 minutes
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Astronomy
From zero to 5,000 – music and visuals express 30 years of exoplanet discoveries
1 minute
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Economics
We all play by economic rules set by men. What could a feminist economics look like?
30 minutes
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Ecology and environmental sciences
Yo-Yo Ma performs a work for cello in the woods, accompanied by a birdsong chorus
4 minutes