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/History of Technology

Breakthroughs, quackery and strange beauty: the afterlife of outmoded medical devices

5 minutes

ORIGINAL
Video/Ethics

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

6 minutes

ORIGINAL
Video/Neuroscience

A happy life is built on pleasures such as sex and food, but also company and variety

7 minutes

Idea/History of Science

Science funding is a gamble so let’s give out money by lottery

Shahar Avin

Essay/Physics

Minding matter

The closer you look, the more the materialist position in physics appears to rest on shaky metaphysical ground

Adam Frank

Video/Evolution

What the spitting archerfish might tell us about small-brain intelligence

4 minutes

Video/Mathematics

A brilliant ‘geometric ballet’ of sound, shape and symmetry on the theme of 180°

5 minutes

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Idea/Cosmology

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

Michael Strauss

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