intelligence

A BBC Earth clip from The Hunt showing Portia jumping spiders, which leap many times their body length and ambush prey larger than themselves.

BBC Earth shows killer whales working as a pod to create waves that wash seals off ice floes, with the producer explaining how the crew captured behavior once thought a myth.

Dominion is a two-hour documentary using drones and hidden cameras to expose conditions in animal agriculture, including food, clothing, entertainment and research. It questions humanity's dominion over animals.

A 1953 US Navy training film explaining the basic mechanisms in mechanical fire control computers aboard ships. It shows how gears, differentials and cams solved mathematical problems in permanent mechanical form.

A compilation of the 1977 BBC series The Secret War, a documentary on British scientific and technical efforts in WWII, including radar, German navigation beams and V-weapons. It features interviews with people who were there, including Albert Speer.

Ben Anderson's VICE documentary shows embedded reporting on Afghan security forces and US Marines in Helmand during the troop drawdown, exposing incompetence, drug abuse and corruption.

Part one of Montemayor's animated-map documentary on the Battle of Midway, told using only the information available to the Japanese side. It focuses on Nagumo's dilemma.

The first part of Dmitry Vasyukov's four-part Russian documentary series about trappers and villagers living in the Siberian taiga. This episode follows spring life along the Yenisei, with hunting, fishing and subsistence in harsh surroundings.

Fools & Dreamers is a 30-minute documentary about Hinewai Nature Reserve in New Zealand, where botanist Hugh Wilson let gorse grow as a nurse canopy to regenerate native forest. It shows the results after 30 years and the local skepticism he faced.

A New York Times Opinion documentary tracing Soviet and KGB disinformation, from the 1980s AIDS origin hoax to modern campaigns like Pizzagate. It features former KGB officers and the people who tried to counter the lies.

An episode of Gwynne Dyer's 1983 documentary series War, about how military basic training turns recruits into soldiers. It covers the psychological side of conditioning.

A very long, detailed look at the A4/V2 rocket turbopump, the steam-turbine-driven twin propellant pump system. It covers the peroxide and permanganate catalysis that drives the turbine. This is part 1 of a series on V2 components.

Kedi is a feature documentary following seven street cats of Istanbul and the people who care for them. It portrays the relationship between the city and its cats.

Machine Thinking tells the story of the Cold War Heavy Press Program, the giant forging presses that make parts for aircraft, missiles and turbines.

Neil Halloran's animated, data-driven documentary visualizes the human cost of World War II and compares it with other wars and the trend toward fewer war deaths in recent decades.

A 1973 NBC News documentary on the US nerve gas arsenal, covering leaks in Okinawa, a Utah test that killed thousands of sheep, and the long-term hazards of storage sites. It won an Emmy.

Tod's Workshop fires full-weight medieval arrows from a 160lb English warbow at reproduced medieval armour. Armour curator Dr Tobias Capwell, an archer and bowyer give historical context and discuss the results.

Part one of Sandia National Labs' first-person documentary on the use control, detonation safety and survivability of US nuclear weapons. It covers nuclear sharing in NATO and how control of use was separated from possession, leading to the always/never problem.

First episode of the Norwegian documentary series Hjernevask, in which Harald Eia interviews researchers on the nature versus nurture debate. It focuses on the gender equality paradox and gender differences in career choice.

A two-minute clip from the documentary The Fog of War in which Robert McNamara recalls Fidel Castro explaining how close the world came to nuclear war during the Cuban Missile Crisis.

A VICE report from 2011 in which Suroosh Alvi revisits the gun markets in Pakistan's tribal areas, a stronghold of the Taliban. It shows weapons being made and sold by hand and a country described as a powder keg.

A clip from Channel 4's Inside Nature's Giants in which Richard Dawkins shows the recurrent laryngeal nerve of the giraffe during a dissection. The nerve takes a long detour down the neck and back up.

A BBC Earth clip from The Hunt showing an octopus species from northern Australia that leaves the water at low tide to hunt crabs on land.

A short Discovery nature clip from North America showing a red fox listening for field mice under the snow and then diving headfirst to catch them. The narration says the fox uses its hearing and the Earth's magnetic field to aim its jump.

A short BBC Planet Earth clip from the Pole to Pole episode showing the courtship displays of birds of paradise.

A US Air Force film on the Heavy Press Program, which built some of the world's largest metal forging and extrusion presses for aircraft, starting from German presses taken after WWII.

Archive footage from 1964 of Royal Marine Commando volunteers filmed on a field exercise after taking LSD at Porton Down. It documents a British military drug trial.

A documentary on North Korean defectors in Seoul and the South Korean intelligence service (NIS, formerly KCIA), including accusations of shady dealings.