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Stanford professor Robert Sapolsky lectures on depression as a real biological disease. He covers its biological and psychological causes, how it differs from ordinary sadness, and ideas such as learned helplessness. He ties these together into one account.

Steve Jobs's 2005 Stanford commencement address, built around three stories: connecting the dots, love and loss including being fired from Apple, and death. It is a 15-minute talk on finding work you love.

Steve Jobs' 2005 Stanford commencement address, told through three stories: connecting the dots, love and loss, and death. It includes the calligraphy class and the 'stay hungry, stay foolish' close.

A five-minute clip of Ira Glass on the gap between good taste and early creative work. He says beginners know their work falls short and must keep producing to close the gap.

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 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.

Jon Stewart appears as a guest on CNN's Crossfire in 2004 and criticizes hosts Tucker Carlson and Paul Begala for turning political debate into partisan theater that hurts America.

The Google I/O 2009 keynote introducing Google Wave, a real-time collaborative communication and document platform. It includes a long live demo and the developer preview announcement.

Footage from the Macworld Boston 1997 keynote where Steve Jobs announces Apple's deal with Microsoft, with Bill Gates appearing on the big screen. The almost bankrupt Apple took Microsoft's investment, and the crowd reacted badly, including booing over Internet Explorer as the default browser.

A short clip of Richard Feynman answering an interviewer's question about how magnets work, in which he explains why a why-question has no simple answer without a shared frame of reference.

Boston Dynamics' March 2008 video of BigDog, a four-legged robot, walking on ice and snow, climbing rubble and recovering from slips and kicks.

The introductory lecture of Stephen Boyd's Stanford Convex Optimization I course (EE 364A). It outlines convex sets, functions and problems, and the course's coverage of least-squares, linear and semidefinite programming, duality and interior-point methods.

Epic 2014 is a short science-fiction film that imagines the media landscape merging into a personalized, computer-generated news service. It is a fictional history of 'Googlezon' and the decline of traditional newspapers.

A short excerpt from a BBC interview in which Richard Feynman explains why he dislikes honors and prizes, including his own Nobel, saying the real reward is the pleasure of finding things out.

Amateur footage of a Thomsonfly 757 ingesting a bird on takeoff from Manchester, with a flaming engine and a safe return, with 233 people aboard.

A That Mitchell and Webb Look sketch in which a hospital A&E is staffed by homeopaths who dilute everything, leaving patients with nothing.

A short promotional video of a 5-axis CNC machine milling an elaborate helmet, made by DAISHIN SEIKI with a DMG machine and hyperMILL CAM software. It shows what 5-axis machining can produce.

A short Fry and Laurie sketch in which a man returns from vacation to find his local police station has been privatized, with paid tiers of service. It satirizes privatization of public services.