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/Music

Melody, rhythm and piety: the rich forms and meanings of Indian classical music

17 minutes

ORIGINAL
Video/Ethics

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

6 minutes

Video/Childhood & Adolescence

Why the ‘exotic and strange’ world of childhood is ripe for horror

5 minutes

Idea/History of Science

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

Adrian Currie & Derek Turner

Video/History of Science

Energy is like children’s toys: often hiding out of sight, but never actually lost

3 minutes

Essay/Deep Time

Welcome to Terra Sapiens

Humans have been altering Earth for millennia, but only now are we wise to what we’re doing. How will we use that wisdom?

David Grinspoon

Idea/Physics

Why we can stop worrying and love the particle accelerator

Joel Frohlich

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Essay/Biology

The queen does not rule

The ant colony has often served as a metaphor for human order and hierarchy. But real ant society is radical to its core

Deborah M Gordon

Video/Evolution

How the mantis shrimp’s six-pupiled eyes put 20/20 vision to shame

4 minutes