How wolves change rivers

5 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/Gender & Sexuality

In southern Mexico, a long-acknowledged ‘third gender’ is not masculine or feminine

9 minutes

ORIGINAL
Video/Ethics

If soldiers act with unjust aggression they are as culpable as civilian criminals

6 minutes

Video/Design & Fashion

A film that dreams of a poem that dreams of tragedy and love

4 minutes

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Idea/Cosmology

Our Universe is too vast for even the most imaginative sci-fi

Michael Strauss

Video/Astronomy

The plodding photon, or how the speed of light looks sluggish on a galactic scale

45 minutes

Essay/Mathematics

How to play mathematics

The world is full of mundane, meek, unconscious things embodying fiendishly complex mathematics. What can we learn from them?

Margaret Wertheim

Video/Evolution

A cut-throat case of evolutionary backstabbing in the Peruvian rainforest

3 minutes

Essay/Physics

This granular life

That the world is not solid but made up of tiny particles is a very ancient insight. Is it humanity’s greatest idea?

Carlo Rovelli

Idea/History of Science

The missing fossils matter as much as the ones we have found

Adrian Currie & Derek Turner