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How wolves change rivers

5 minutes

Ladies and gentlemen… Mr Leonard Cohen

44 minutes

The secret language of trees

5 minutes

EXCLUSIVE

Tarikat

17 minutes

Why did the Mexican jumping bean jump?

4 minutes

How the return of just 66 wolves rejuvenated Yellowstone’s entire ecosystem

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

A trip to Montreal with Leonard Cohen in 1965 is a glimpse into a singular poetic mind

In 1965, the celebrated Canadian writer Leonard Cohen (1934-2016) took a trip from Greece, where he then lived, to his home city of Montreal. There, he visited friends and family, gave readings at a series of engagements and, more generally, renewed his ‘neurotic affiliations’. The Canadian directors Donald Brittain and Don Owen chronicled Cohen’s visit for their documentary Ladies and Gentlemen… Mr Leonard Cohen. The film finds Cohen – who, at just 30, is already an established and celebrated literary voice – drifting between live performances, snowy streets, bistros and the cheap hotels where he takes refuge. With their informal and engaging portrait, Brittain and Owen provide a riveting glimpse into Cohen’s life as an artist, centred on channelling ‘hypersensitivity and an enormous curiosity’ into witty, penetrating and often enigmatic poetry and prose.

Directors: Donald Brittain, Don Owen

Website: National Film Board of Canada

The incredible – and still quite mysterious – way trees trade information via their roots

While researching her doctoral thesis, Suzanne Simard, now a professor of forest ecology at the University of British Columbia, made an astounding discovery – trees in forests seem to possess complex information superhighways in their root systems that allow them to share information. Her 1995 doctoral thesis on the topic has been part of a revolution in how scientists view plants, leading many to suggest that they possess cognitive abilities, and even intelligence. This animation from TED-Ed details the symbiotic relationship – between tree roots and fungi called mycorrhizae – that serves as the foundation of these intricate intra-tree communication networks, allowing them to trade news on topics such as drought and insect attacks, and even detect if an incoming message has been sent by a close relative.

Video by TED Ed

Director: Avi Ofer

Writers: Camille Defrenne, Suzanne Simard

Dissolve into the immersive, entrancing rhythms of a Sufi chant

A ritual at the heart of Sufism, the dhikr is a demonstration of devotion in which worshippers share in a meditation on Allah via synchronised group chants, rhythmic movements and, in some instances, the spinning dances of whirling dervishes. The Dutch-Chinese-American filmmaker Jasmijn Schrofer drops viewers into the rhythms of the dhikr in her short film Tarikat (‘The Path’). Through the ritual of sound and movement, the individuals seem to dissolve into a unified whole, even as Schrofer often lingers on the close-up expressions of each one. The result is an intimate and immersive viewing experience in which viewers might just find themselves lost in a trance alongside the faithful.

Director: Jasmijn Schrofer

Producer: Rianne Ebeling

How moth larvae carve out cozy, mobile homes inside Mexican jumping beans

You might know that moth larvae are the hidden creatures that make Mexican jumping beans jump. You might also know that Mexican jumping beans aren’t ‘beans’ at all, but seed pods – those of a shrub native to the Sonoran Desert, which straddles the border of Mexico, Arizona and California. But, as this video from the science documentary series Deep Look explores, burrowing further into the lives of Mexican jumping bean inhabitants still makes for highly fascinating viewing. Captured in stunning 4K resolution, this short film documents the months that a jumping bean moth larva spends hollowing out, residing inside, and manually repairing and relocating its 10mm home, before ultimately emerging in its mature form.

Video by KQED Science

Producer and Writer: Mike Seely

Narrator and Writer: Laura Klivans

Cinematographer: Kevin Collins

How the return of just 66 wolves rejuvenated Yellowstone’s entire ecosystem

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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Fremont Street, Las Vegas, 1982. Photo by Harry Gruyaert/Magnum

Essay/
Mathematics
Mathematics for gamblers

If philosophers and mathematicians struggle with probability, can gamblers really hope to grasp their losing game?

Catalin Barboianu