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A four-pane view of Armadillo Aerospace's Mod vehicle on a June 2010 boosted hop. The flight includes engine shutdown, drogue chute deployment, an engine restart and a safe landing.

An American Airlines training video by Captain Warren VanderBurgh on control malfunctions and flight instrument anomalies. It discusses real incidents such as runaway trim and instrument failures and how crews should respond.

Half as Interesting explains why airlines flew empty 'ghost flights' out of Heathrow to keep their landing slots under use-it-or-lose-it rules.

DIY Perks shows how to turn old or smashed TVs and monitors into realistic artificial window lights, using the backlight and Fresnel lens to simulate distant daylight.

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.

An 8-minute explainer on the Lightning Network and how it relates to Segwit, Bitcoin and Litecoin. It covers how off-chain payment channels route payments to scale blockchain transactions.

Rick Falkvinge responds to viewer feedback on his earlier Lightning Network video and raises a flaw he says was not previously discussed. The main thread is the network's unsolved routing problem.

A short look at CoeLux, an artificial skylight that recreates the scattering process that makes the sky look blue, producing a convincing illusion of distant sun and depth.

A SIGGRAPH 2013 demo from Douglas Lanman and NVIDIA of near-eye light field displays, which allow much thinner head-mounted displays that still show accurate focus and depth cues.

A 2017 video arguing that banks and Blockstream steered Bitcoin toward the Lightning Network. It is partisan commentary from the Bitcoin Cash side of the scaling dispute.

Mentour Pilot, a 737 captain, demonstrates in a full flight simulator why a Boeing 737 can become impossible to trim manually at high speed. He explains the jackscrew forces and the roller-coaster manoeuvre.

Footage of the first manned flight of an electric multicopter, flown by Volocopter (then e-volo) in October 2011. The 90-second flight was a Guinness World Record.

A man with no flight instruction and only desktop flight simulator experience attempts to take off and land a Cessna 172, with a commercial airline instructor aboard who gives no help. The flight came out of a prop bet.

SpaceX's livestream of the Falcon Heavy test flight, including the launch, side booster landings and Tesla Roadster payload. It was the first launch of the most powerful operational rocket at the time.

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.

A PyCon 2013 block of Friday evening lightning talks. It includes the debut of Hy, a Lisp dialect that compiles to Python AST, and Solomon Hykes's first public talk on Docker.

Professor Mike Merrifield of Nottingham explains in a mostly uncut conversation why light travels slower in glass. He treats light as a wave and describes how the material's electrons produce secondary waves that combine to slow it.

PBS Space Time argues that the speed of light is better understood as the speed of causality, the universal limit on how fast cause and effect propagate. Light travels at that speed because it is massless, but the limit itself is a property of spacetime.

Fermilab's Don Lincoln explains why light travels slower in water and glass. He knocks down common wrong explanations such as absorption and re-emission, then gives the wave-mechanics reason tied to refractive index.

ScienceClic explains why nothing can go faster than light by treating motion through space and time together, so everything moves at the speed of light through spacetime. It uses animated visuals to cover relativity basics in 12 minutes.

MIT Media Lab shows an imaging system capturing a trillion frames per second, fast enough to film light pulses travelling through objects in slow motion.

The Slow Mo Guys visit a lab with a camera capable of filming at 10 trillion frames per second, fast enough to see light travel. They show the setup and the resulting footage.

Wendover Productions explains why Boeing's efficient 787 beat Airbus's giant A380, contrasting hub-and-spoke with point-to-point routes. It covers the economics of long-haul flights.

LEMMiNO's 25-minute documentary on the 2014 disappearance of Malaysia Airlines Flight 370. It walks through the official investigation's findings and the leading theories, including satellite data and hydrophone recordings.

A Fully Charged episode on Electroflight, an early-stage project to build a fully electric racing plane that can exceed 300 mph. It features two motors driving contra-rotating propellers.

AVweb's flight trial of Garmin's Emergency Autoland system, which flies a plane to a runway and lands it when the pilot cannot. It is part of Garmin's Autonomi automation on the G3000 avionics.

Real air traffic control audio of the Air Astana flight whose flight controls had been wired in reverse by a maintenance error. The pilots struggle to keep control while ATC tries to help.

Douglas Hofstadter lectures at Uppsala University on how analogy and daring thinking drove Einstein's discovery of light quanta. He argues deep insight in physics comes from imaginative leaps rather than rigid logic.

A short screen recording of the flight simulator Easter egg hidden in Excel 97, with the steps to trigger it. The uploader notes the mouse controls are hard to handle.

A Ropecon 2019 talk by a lighting designer and a software engineer on how the Odysseus larp spaceship was built, using over ten IT systems, hundreds of lights and dozens of speakers. It covers the lessons learned.

First part of a six-part recording of the 1973 Lighthill debate on AI, where Sir James Lighthill's critical report on AI research was contested by figures including McCarthy and Michie.

A full piano performance of Beethoven's Piano Sonata No. 14, the Moonlight Sonata, with all three movements: Adagio sostenuto, Allegretto and Presto agitato.

A five-minute lightning talk from React.js Conf 2016 by Elie Rotenberg on protecting the DOM from tampering. It shows how React tree obfuscation (react-armor) can shuffle class names, tags and tree structure to defeat CSS-selector-based ad blocking.

The full 1973 BBC Lighthill debate on artificial intelligence, featuring James Lighthill, Donald Michie, Richard Gregory and John McCarthy. It documents the argument that preceded the 1970s AI winter and includes early robot demos.

Tom Scott investigates moire-effect beacons, called Inogon leading marks, a Swedish invention from the 1980s that shows different patterns depending on the viewer's position. He visits one used to mark an undersea cable and tracks down its history.

A short GoPro film of Uli Emanuele's wingsuit BASE jump through a roughly 2 meter wide cave opening, after three years of preparation. It follows his climb to the exit point and the flight itself, shot on a HERO2 camera.

A collection of lightning talks from the Surge 2015 conference on scalable systems, hosted by Geir Magnusson. HN mostly points to one segment, a Bryan Cantrill talk touching on madvise semantics.

Nature video showing MIT researchers flying the first plane with no moving parts, powered by an ion drive that creates an ionic wind from high-powered electrodes. The 5m-wide craft flies across a sports hall.

ETH Zurich researchers demonstrate a quadrocopter that keeps flying stably after losing a motor and propeller entirely, with the algorithm running onboard while a pilot flies it.

GE Lighting's official how-to for factory resetting C by GE smart bulbs, using a long sequence of precisely timed on and off cycles.