construction speed

Veritasium explains why the one-way speed of light has never been measured, only the round-trip speed, since measuring it requires synchronized clocks that assume the answer. It explores the implications for relativity.

CityNerd lays out a data-driven method for deciding where high-speed rail should be built in North America and identifies 56 city pairs that justify it, based on population and distance.

Time-lapse of Broad Group erecting a 30-story prefabricated hotel (J57) in Changsha, China in about 15 days. The description touts modular construction's precision, speed and low waste.

Google's 2010 Chrome ad filmed web page rendering with a high-speed camera, comparing it with a potato gun, a pirate ship and lightning. It presented browser speed as Chrome's key selling point.

Cosmo's 22:38 Ocarina of Time speedrun, performed live at AGDQ 2013. The runner uses a complex exploit to skip much of the game.

Not Just Bikes explains how North American speed limits are set and why posted limits matter far less than street design. It argues that drivers follow the road's cues, so safe speeds have to be built into the street.

A short demo from the Ishikawa Komuro Lab of a high-speed robot hand paired with a 1000fps vision system performing dexterous manipulation. It shows what very low-latency vision and actuation can do.

AlphaPhoenix shows off a new camera that films at two billion frames per second and uses it to film a laser pointer pulse. He investigates a strange quirk in how the speed of light appears on camera.

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.

In the finale of Double Fine's Devs Play, speedrunner SMK demonstrates glitches and exploits that skip entire sections of Psychonauts while Tim Schafer and the dev team watch. The developers react to and discuss the bugs as they appear.

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.

Jack Gallant's lab demonstrates reconstructing movie trailer clips a subject watched from fMRI brain activity, using regression models trained on hours of viewing data. The video shows the original clip beside the reconstruction.

A GoPro-recorded flight of an RC glider setting a 548 mph dynamic soaring speed record at Parker Mountain, California, using only wind gradients.

A three-minute student film from Campus MovieFest showing drivers in every lane holding exactly the speed limit on an Atlanta-area interstate and the traffic jam that results.

An Opera browser promotional video from 2010 in which a browser races a potato in a tongue-in-cheek speed test.

Matt Parker analyzes the Minecraft speedrunning controversy in which Dream was accused of cheating via improbably lucky drops. He walks through the probability and the statistical arguments in the original accusation and the reply.

Summoning Salt traces the speedrunning history of Mario Kart 64's Choco Mountain track and its famous shortcut, through the successive record holders and discoveries. It carries an epilepsy warning for flickering lights.

A tool-assisted speedrun of Ocarina of Time at Summer Games Done Quick 2022, using TASBot and arbitrary code execution to reach an alternate ending in about 53 minutes. The run is introduced by its creators and followed by an interview.

Thunderf00t presents high-speed camera footage of alkali metals such as sodium and NaK reacting with water. The footage shows that the explosion is not caused by hydrogen ignition, as the usual explanation says. It is a Coulomb explosion driven by electrons leaving the metal.

A Vox explainer on why California's high-speed rail project is years late and far over budget, with only a few concrete structures built by 2022. It covers the political, legal and routing challenges behind the delays.

A tool-assisted speedrun of Pokemon Yellow on Game Boy Color that uses glitches and frame-precise inputs to make the game execute an arbitrary program. It was later obsoleted by an improved run.

A half-hour television special on the 2007 fiery collapse of a connector in the Bay Area's MacArthur Maze and its rebuilding in 26 days. It was produced for the Professional Engineers in California Government.

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.

A University of Tokyo demo of a rock-paper-scissors robot that always wins, using high-speed vision to read the human hand and respond faster than people can perceive.

A short GRASP Lab (University of Pennsylvania) demo in which teams of quadrotors autonomously assemble tower-like cubic structures from modular parts. The drones are given the target structure and work out the assembly plan themselves.

Anders Hejlsberg whiteboards how compilers are taught versus how modern ones are actually built. He explains the shift to compilers as services with incremental, error-tolerant, IDE-oriented design, as in Roslyn and TypeScript.

SethBling performs the first credits warp in Super Mario World on a real SNES console, a glitch that plays the ending without beating Bowser. The run relies on pixel-perfect positioning and tools such as a helper ROM hack.

A University of Tokyo lab demonstrates a book scanner that flips pages automatically and scans over 250 pages per minute. It uses real-time 3D recognition of the flipped pages and then restores each one to a flat image.

Builders Matt Risinger and Jordan Smith visit a Swiss cross-laminated timber factory that makes thick all-wood walls with no traditional insulation and wooden nails instead of glue or chemicals. The video is sponsored by Siga.

An episode of the Well There's Your Problem podcast on five-over-one buildings, wood-frame floors atop concrete bases, with engineering background and some oil industry news. It is long, rambling and has NSFW language.

A 11:29 complete speedrun of Quake on Nightmare difficulty by the Quake done Quick team, assembled from separately recorded runs refined since 1996.

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.

Andrei Alexandrescu's CppCon 2019 talk revisits sorting, showing how branchless tricks, hybrid strategies and a cost metric can speed up std::sort-style algorithms on modern hardware.

Admiral Grace Hopper holds up a length of wire to show how far light travels in a nanosecond, about 11.8 inches. She explains how she made the idea concrete to people who could not picture a billionth of a second.

Smarter Every Day films Prince Rupert's drops, tempered glass drops, in high-speed slow motion at 130,000 fps. It shows how the drop's heavy internal stress lets the head survive hits while the tail shatters the whole thing.

Alexander Rose of the Long Now Foundation describes the design and construction of the 10,000 year clock conceived by Danny Hillis. He covers the project's history, methods, and how different cultures built things to last millennia.

A short clip of the McMurtry Speirling fan car setting a new Goodwood Hill record of 39.08 seconds at the 2022 Festival of Speed, driven by Max Chilton. It beat the previous timed shootout record set in 1999 and the outright record held by the VW ID.R.

Matthias Wandel tests old and new code on a range of PCs, including a new mini PC, to measure how much faster modern hardware really is. He also shows optimization techniques such as branchless code, with benchmark programs on GitHub.

Essential Craftsman announces the start of a spec house build on a scenic lot, kicking off a long series. The channel covers every step of building a house from the viewpoint of a general contractor.

Veritasium explores why time seems to speed up as we age, covering chronoception and several competing explanations beyond the common proportional-theory argument.