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An excerpt from the documentary Mountain Talk on Appalachian English. Residents of Southern Appalachia talk about their dialect and give examples of its distinctive words.

Carl Sagan's narration of the Pale Blue Dot passage, reflecting on the Voyager photograph of Earth as a tiny speck in space. It is a short meditation on humanity's smallness and shared home.

A short video of stretching and hand exercises for preventing and easing tendinitis and carpal tunnel syndrome, from a percussion teacher. The exercises were shown to him by a doctor.

A clip of the Yes Men posing as a Dow Chemical spokesman on the BBC and announcing compensation for victims of the Bhopal disaster, a hoax on live television.

A clip of "My Pal Foot Foot" by The Shaggs, the 1960s sisters band famous for their off-kilter amateur sound. The uploader credits a Frank Zappa quote claiming they are better than the Beatles.

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.

The first video in potholer54's climate series, giving a basic look at how climate scientists infer that man-made carbon gases are changing the climate. It is a short explainer meant to present the scientific evidence plainly.

Karl Sims's 1994 demonstration of evolved virtual creatures: block-bodied creatures whose bodies and controllers are evolved through selection, mutation and recombination to swim, walk and compete.

Chalmers Johnson, author of Blowback and Sorrows of Empire, lectures on parallels between the decline of the Roman and Soviet empires and the United States. He argues the US shows the same symptoms: overextension, corruption, and an inability to reform.

A four-minute extract from the documentary The Fog of War in which Robert McNamara discusses the Gulf of Tonkin incident. He acknowledges that the second reported attack did not happen.

A short clip of John McCain, asked about Iran, singing 'Bomb bomb bomb, bomb bomb Iran' to the tune of the Beach Boys' Barbara Ann.

A 2007 Google Tech Talk introducing Polyworld, an artificial life simulator used to evolve artificial intelligence by designing worlds rather than minds. It presents results from ongoing attempts to evolve intelligent behavior.

A one-minute clip of John McCain singing 'Bomb bomb Iran' to the tune of a Beach Boys song at a 2007 campaign event.

A one-minute demo at the Computer History Museum's IBM 1401 restoration lab, where a program makes the machine's radio-frequency interference play tunes on an AM radio.