intelligence

A short BBC clip narrated by David Attenborough showing crows in Japan using city traffic to crack nuts, dropping them at intersections and retrieving them when the light changes.

A condensed film of Dick Proenneke's footage of building a cabin and living alone in the Alaskan wilderness, using hand tools and local materials. It draws on the 8mm films he shot himself.

A clip from Attenborough's Life of Mammals following a San tribesman in the Kalahari on an eight-hour persistence hunt, running down a kudu through harsh heat. It shows tracking, endurance running and the hunter's reaction after the kill.

A three-minute clip from BBC's Planet Earth narrated by David Attenborough about Cordyceps, the fungus that infects insects and takes over their behavior. It shows an infected ant and its demise.

A short BBC clip in which David Attenborough shows a lyrebird imitating sounds, including camera shutters, car alarms and chainsaws. It comes from the BBC natural history series Life on Earth.

A short BBC Earth clip from David Attenborough's Life of Birds showing a lyrebird imitating sounds, including a chainsaw and camera shutter, so accurately it is hard to tell from the real thing.

A BBC Weird Nature clip about vervet monkeys in the Caribbean that drink alcohol, and how they split into heavy drinkers, social drinkers and teetotalers.

A clip from BBC's Last Chance to See in which Stephen Fry and Mark Carwardine meet Sirocco, a kakapo, who famously tries to mate with Carwardine's head. The kakapo is a critically endangered flightless New Zealand parrot.

Short BBC Earth clip from Life of Mammals in which David Attenborough shows orangutans imitating human behaviors like washing clothes with soap and using tools.

A dramatization of a hypothetical Soviet first strike that destroys US bombers and Minuteman missiles, filmed with US Air Force cooperation. It is a short version of the 1979 documentary First Strike.