at&t

A Bell Labs film in which Dr. J.N. Shive uses a mechanical wave machine to demonstrate reflection, standing waves, resonance and impedance matching. He includes some equations but relies mostly on real-world examples a layperson can follow.

A 1973 AT&T training film made for new employees at Bell Labs' Holmdel Computing Center, when Unix was in its third version and running at 16 computer centers in the Bell System. It shows how users submitted jobs and used the center's machines.

The 1969 pitch film in which Saul Bass presents the Bell System logo redesign to AT&T, part of the largest corporate re-identity program in U.S. history.

A look at AT&T's 1993 You Will ad campaign, which showed technologies such as video calls and telemedicine that were then under development. It explains the story behind ads that anticipated much of today's technology.

A 1982 Bell Labs film hosted by Victor Vyssotsky on the origins and design philosophy of the UNIX operating system, with appearances by Kernighan, Thompson and Ritchie. It shows pipes, filters and a shell one-liner spell checker being built.

A 1982 AT&T Bell Labs film for students about the Unix system and how it can be used practically. It includes Lorinda Cherry building a talking calculator by piping together Unix commands, and a spell checker made from Unix utilities.

A 1951 Bell System training film showing how telephone calls are routed through a step-by-step (Strowger) switching office.

Hans Rosling uses data and animated statistics to show how world population is changing, why birth rates fall as child survival and wealth rise, and why population is expected to peak around 11 billion. It also tackles common misconceptions about Africa and family planning.

Ed Catmull of Pixar speaks at Stanford's 2007 Entrepreneurship Conference on running a creative company. He argues for surfacing small problems early and building good teams, with stories like the Toy Story 2 crunch.

Climate Town argues for moving away from gas stoves. It covers the gas industry's decades of marketing and lobbying, health effects of gas cooking, methane leaks, and the case for induction.

The first lecture of Andy Pavlo's CMU 15-445 Intro to Database Systems (Fall 2019), covering course introduction and the relational model.

The first lecture of N J Wildberger's History of Mathematics course, starting with Pythagoras' theorem and following Stillwell's text. It emphasizes the flow of ideas over proofs.

An award-winning 3D animation by XVIVO for Harvard's BioVisions showing the molecular machinery inside a cell as a white blood cell responds to a stimulus.

Herbert Wolverson's Roguelike Celebration 2020 talk surveying procedural map generation techniques, including integration of hand-crafted prefabs and vaults.

Mathologer shows how times table diagrams on a circle produce cardioids and other curves connected to the Mandelbrot set. He explains the patterns and links to a tool for making your own diagrams.

Mathematician Colin Wright demonstrates juggling and explains the mathematics of juggling patterns, including notation that led to new throwing patterns. It is a public presentation at the Museum of Mathematics aimed at a general audience.

Climate Town tells the history of the period when the greenhouse effect was not politically controversial and the US came close to acting on climate. It covers Exxon's early climate science and the policy failures that followed.

The American Museum of Natural History's film flies from the Himalayas out through the atmosphere and solar system to the afterglow of the Big Bang, using its Digital Universe Atlas four-dimensional map.

A short Yes Minister clip in which Sir Humphrey explains why a hospital with no patients still needs a large administrative staff. It is a satirical look at bureaucratic bloat in the public sector.

Rusty Russell and Matt Evans examine why Unix utilities like ls and cat grew from a few kilobytes to over a hundred kilobytes. They take apart common tools to see where the growth comes from.

Nathan Kutz presents the spatio-temporal dynamics of rotating detonation rocket engines, including combustion fronts that behave like solitons. He shows a bifurcation analysis of a multiscale model that captures the main features.

Matt Parker of Stand-up Maths examines scatter plots that were claimed to show fraudulent vote-switching in Michigan's 2020 election. He recreates the analysis and shows that the pattern arises from comparing percentages across different bases, not from fraud.

A two-minute explanation of what a rocket mass heater is, starting from how a conventional wood stove works and why creosote and chimney fires occur. It shows how burning hot and storing the heat in thermal mass makes for an efficient heater.

Branch Education explains how Starlink works, from the ground dish and satellites to phased-array beam steering and data routing. Animations cover how a beam stays connected to a satellite moving at 27,000 km/h.

Matt Parker's LMS popular lecture on how seemingly incredible results can be meaningless random patterns. He ranges from ancient Woolworths civilisations to shoelaces and DNA.

Matt Parker of Stand-up Maths explains single-pile Nim and the trick that wins it, using Dr NIM, a 1960s mechanical plastic computer that plays perfectly. He teaches the strategy so viewers can beat friends.

A Microsoft Flight Simulator Feature Discovery episode in which CEO Sebastian Wloch explains the new aerodynamics simulation for the 2020 release.

A five-minute clip of a George Carlin routine arguing that the education system is designed to produce compliant citizens rather than critical thinkers. It ties schooling to the interests of the people who own the country.

A short Great Big Story piece about Hagoromo, a Japanese chalk brand so prized that mathematicians stockpiled it, with some reportedly dealing it on the side. It tells the quirky tale of a writing tool whose supply became scarce.

GreatScott! tests ProLogium lithium ceramic batteries, a solid-state design. He measures their volumetric and gravimetric energy density, compares them to Li-ion and LiPo, and runs durability tests at the end.

A 2013 research demo of simulated bipedal creatures whose natural gaits are found by optimizing muscle-based controllers, with no motion capture or keyframe animation. It shows physics-based walking and running emerging from musculoskeletal models.

Matt Parker of Stand-up Maths examines the Texas Supreme Court filing claiming Biden's 2020 win had a one-in-a-quadrillion chance. He walks through why the statistical argument is flawed.

A Yes, Prime Minister scene in which Sir Humphrey shows how leading questions can make a poll produce either answer on national service.

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.

An SMBC Theater sketch in which JP Nickel presents 'both sides' on every issue, satirizing false balance in news coverage.

A 1975 Saturday Night Live sketch in which Chevy Chase gives Richard Pryor a word association test during a job interview, escalating into trading racial slurs. It is a landmark piece of racial satire.

Thomas Garrity discusses mathematical maturity, a concept mathematicians use for professional development, and how it can inform teaching, mentoring and careers. It was given at the IAS/PCMI Park City Mathematics Institute.

Alan Kay argues for rethinking how computer science is taught in schools, drawing on his work on object-oriented programming and GUIs. He discusses how poorly people understand complex systems and what education could do about it.

Frederic Laloux presents his research on self-managing, purpose-driven organizations, followed by Q&A. He summarizes the findings of his book Reinventing Organizations and examples such as Buurtzorg.

A Yes Minister sketch in which Jim Hacker and Sir Humphrey meet the BBC and discuss its independence from government pressure. It is a satirical look at the relationship between the state and the broadcaster.