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Steve Mould shows that LEDs and solar panels are both diodes made from semiconductors, so a solar panel can emit light and an LED can generate electricity. He demonstrates a small solar panel lighting up.

Technology Connections experiments with filtering white and colored LEDs to make holiday lights look less garish. He explains why narrowband LED strings look harsh compared with incandescent bulbs.

Technology Connections explains how LED traffic lights, which do not melt snow, drew complaints and were blamed for accidents. He uses it to illustrate the 'but sometimes' fallacy against new technology.

Theo de Raadt presents pledge, a new OpenBSD security mechanism that kills processes which exceed the system calls they declared they need. The talk was given late at night at Hackfest 2015.

A Technology Connections video weighing LED streetlights against high pressure sodium lamps, covering efficiency, color, cost and light pollution. It is a follow-up to his earlier explanation of why street lights are orange.

Apple's late-1980s Knowledge Navigator concept video, produced under John Sculley, showing a professor using a tablet-like device with a conversational software agent. It envisions hypertext, touchscreens and voice assistants.

A three-minute demo of a series circuit with three LEDs that behaves in a surprising way, posed as a question of how it works.

Alan Watson Featherstone, founder of Trees for Life, describes nearly 30 years of work restoring the ancient Caledonian Forest in the Scottish Highlands, illustrated with his photography.

A demo of Deldo, an Emacs package that lets Emacs hooks trigger vibration events on computer-controllable sex toys. It is an absurd teledildonics project that is half performance art.

Leaked internal Google X video, 'The Selfish Ledger', a speculative thought experiment about treating user data as a ledger that could guide and shape human behavior, including products sold to fill data gaps.

Apple's 1987 Knowledge Navigator concept video, made for John Sculley's EDUCOM keynote, showing a professor conversing with a tablet-based AI assistant.

Dropbox engineer Kevin Modzelewski gives a Stanford colloquium on Dropbox's history and the technical problems it faced scaling, including detailed database schema decisions.

A short excerpt from a 1973 Yorkshire TV film in which Richard Feynman explains that knowing the name of something is not the same as knowing it.

Alan Kay's tribute to Ted Nelson at the Intertwingled festival, presented using a revived Smalltalk-78 system running on emulated 1970s Xerox PARC hardware. It shows live, user-programmable software from that era.

CGP Grey explains why European diseases devastated the Americas while few deadly diseases traveled the other way. He ties it to livestock domestication, dense cities, and the ideas of Guns, Germs and Steel.

The full 1971 Dutch television debate between Noam Chomsky and Michel Foucault on human nature, with subtitles. They discuss creativity, knowledge, power and politics.

The Primitive Technology channel shows the construction of a tiled roof hut in the bush using only primitive tools and materials made in earlier videos. It includes tiles, a kiln, clay walls and underfloor heating.

Who Killed Captain Alex is Uganda's first action movie, made for under $200 by Nabwana IGG in Wakaliga. This version has English subtitles and a video joker (VJ Emmie) providing running commentary.

An episode of Adam Savage's Still Untitled podcast with molecular biologist Joe DeRisi. They discuss his work, including sequencing to detect rare infections, in a conversation Savage calls possibly the show's scariest.

Kirsten Dirksen profiles Steve Rees, who buried two shipping containers to build an earth-cooled, off-grid 640 sq ft home in Northern California for about $30,000, solar included.

Part one of Technology Connections' account of the VHS versus Betamax format war. It argues Sony was caught off guard by JVC's cheaper, more practical VHS system.

Kirsten Dirksen tours the underground ferro-cement dome home of Paula and Bill Lishman, the family behind the geese-led flight story. The skylit earth-sheltered house stays warm below the frost line.

Chubbyemu narrates the true case of a professor who spilled two drops of dimethylmercury on her hand and suffered fatal neurological damage.

A short clip of Steve Jobs explaining why Xerox failed, arguing that product people lose out to sales and marketing people once a company becomes dominant.

Christian Schafmeister presents CANDO at the 2016 European Lisp Symposium. It is a compiled Lisp-based language for designing macromolecules and nanoscale materials, built on the Clasp implementation of Common Lisp.

Sunspring is a sci-fi short film starring Thomas Middleditch. Its screenplay was written by an LSTM neural network trained on sci-fi scripts, and the team shot and edited it in 48 hours.

A short clip of Steve Jobs explaining why Xerox failed to capitalize on its inventions. He says monopoly profits let sales and marketing people take over from product people.

A controlled demonstration by Wabash National of a tank trailer collapsing under vacuum, staged at an industry expo. The tank implodes as air is pulled out.

An AP clip from the July 2018 NATO breakfast in Brussels in which Donald Trump says a gas pipeline leaves Germany totally controlled by and captive to Russia.

The Who performing Won't Get Fooled Again at Shepperton Studios in 1978, filmed for The Kids Are Alright. It was Keith Moon's last performance with the band.

A subtitled 1958 clip of Egyptian president Gamal Abdel Nasser recounting, with laughter, a Muslim Brotherhood suggestion that women be required to wear a head covering.

A short CNBC clip from 2018 in which President Trump criticizes Germany for paying billions of dollars to Russia for energy, saying Germany is 'totally controlled' by Russia. It comes from a NATO summit news segment.

An Onion Talks satire in which a young media professional pitches compost-powered cars, offering the idea itself and leaving all implementation to others.

An Ars Technica War Stories episode in which Richard Garriott and Starr Long describe Ultima Online's planned virtual ecology and how players wrecked it. Players slaughtered the animals and also broke the in-game economy.

A short Veritasium video explaining regression to the mean and how ignoring it leads to wrong conclusions about punishment versus reward, medical treatments and sports streaks. It uses the example of flight instructors who believed criticism works better than praise.

A Waymo clip, sped up 3x, showing its autonomous car stopping at a broken traffic light and proceeding on a police officer's hand signals.

A scene from The Sopranos in which two old-school mobsters try to extort a Starbucks and learn that electronic payments leave an indisputable record of sales.

Jonathan Blow's DevGAMM 2019 talk argues that software knowledge is being lost between generations and that growing layers of abstraction could lead to a decline in technological civilization.

Part one of a 1996 BBC Modern Times documentary on the training to become a London black cab driver. It follows candidates learning the Knowledge and facing stressful repeated exams with Public Carriage Office examiners.

Epic Games shows how LED walls can provide both virtual backgrounds and real lighting, letting scenes be captured in camera in a single pass with Unreal Engine.