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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
Witness the majesty of moths taking flight at 6,000 frames per second
Jocelyn Bell discovered pulsars. The Nobel Prize went to her supervisor
Animals and humans
A bluesy ballad tells the story of Old Bet, the first circus elephant in the US
In this 1975 lecture, the maglev train’s inventor deconstructs his ingenious design
Meaning and the good life
To know or not to know? Lillian weighs the costs of a life-changing genetic test
Information and communication
There are many ways to make a flat map of the world – each of them a unique distortion
Liquid experiments show how beautiful things can happen when chemicals meet
What is it like to clean the world for tomorrow while the rest of a city sleeps?
Philosophy of mind
Caring for the vulnerable opens gateways to our richest, deepest brain states