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A short clip from Carl Sagan's Cosmos in which he explains how Eratosthenes measured the circumference of the Earth using shadows in two Egyptian cities. It is a clear, visual account of an ancient scientific feat.

Destin of Smarter Every Day learns to ride a bicycle whose steering is reversed, taking about eight months, and compares it with how his young son learned much faster. It illustrates knowledge versus understanding and brain plasticity in adults versus children.

Nardwuar interviews Pharrell and Shay of N.E.R.D. in Vancouver, using his trademark deep research and gifts. The extended version runs about ten minutes.

Mark Rober and Jabril build an app that uses machine learning to decode baseball sign sequences. The video also explains neural networks in a simple, accessible way.

Mark Handley of UCL looks at how SpaceX's November 2018 revisions to the Starlink constellation affect network behavior. The video visualizes the orbits and routing and estimates latencies, building on his earlier video and research paper.

Isaac Arthur examines the Dark Forest theory, Cixin Liu's proposed solution to the Fermi Paradox in which civilizations stay silent and may destroy any that reveal themselves. He tests the theory's underlying assumptions and arguments.

David and Ben Crystal introduce the Original Pronunciation production of Shakespeare and show what it reveals about the history of English, including puns and rhymes lost in modern speech.

Tolgahan Cogulu demonstrates a fixed-fret microtonal guitar, playing music that uses notes between the usual twelve semitones. The channel is dedicated to his microtonal guitar designs.

Bang! is an Atari 2600 demo by XAYAX that won first place at the Revision 2014 oldschool demo competition. It fits into a 32k ROM using F8SC bankswitching.

Mark Handley of UCL explains, with simulation visualizations, how early Starlink satellites without inter-satellite links could still give low-latency wide-area communication by hopping via ground relays. He shows it can beat fibre on many long paths.

Mark Rober tests whether self-driving cars can be fooled, comparing a lidar-equipped car with a camera-only Tesla in scenarios including a painted Wile E. Coyote wall and smoke.

Karl Sims's 1994 demonstration of evolved virtual creatures: block-bodied creatures whose bodies and controllers are evolved through selection, mutation and recombination to swim, walk and compete.

Robert Llewellyn of Fully Charged takes an early, 19-minute test drive of the Honda e electric car in Frankfurt. He looks at its acceleration, camera wing mirrors and tight turning circle.

Mark Rober builds a machine that plays the Cyclone arcade game with perfect timing and discovers the game is rigged so that perfect play still loses. The video explains the physics and electronics tricks behind carnival-style skill games.

In this Top Gear segment Jeremy Clarkson tries to roll a Reliant Robin three-wheeler through Barnsley, with celebrity helpers trying to keep it upright. The car keeps tipping over.

Jay Leno takes a host for a spin in his restored 1909 Baker Electric car on My Classic Car. It shows an early electric vehicle and what driving one is like.

NASA Goddard recreates the Apollo 8 Earthrise moment using Lunar Reconnaissance Orbiter data, narrated by Andrew Chaikin and synced with the astronauts' recorded conversation. It marks the flight's 45th anniversary.

Samy Kamkar demonstrates OpenSesame, a device that opens many fixed-code garage doors in seconds by exploiting a newly found attack, built around a Mattel toy. The video explains the attack and which brands are affected.

Researchers from the Artificial Life Lab Graz introduce the Primordial Particle System, where a simple motion law for self-propelled particles produces cell-like structures that self-reproduce and show life cycles.

Top Gear segment in which Richard Hammond drives a Renault R25 Formula 1 car around Silverstone for two laps. He struggles with the car's demands.

A Fully Charged episode where Robert Llewellyn visits an Oxford street trialling Urban Electric's pop-up chargers. These are retractable 7kW charging points built into street furniture for homes without off-street parking.

Fully Charged gets an exclusive first drive of the Porsche Taycan, running 0-200 km/h launch control repeatedly. It covers the car's twin-motor 800-volt specs, claimed range and fast charging.

Top Gear segment in which Hammond and May try to turn a Reliant Robin into a space shuttle. Launching is easy, but landing it safely is the problem.

A Fully Charged episode on Ubitricity, a German company that turns ordinary street lamp posts into roughly 5 kW overnight EV charge points, with a locking cable and managed billing.

Destin Sandlin of Smarter Every Day explores how grain bins work and the engineering and know-how involved in farming. His point is that farmers are exceptionally capable.

Archer Lars Andersen demonstrates fast, accurate shooting techniques he says he revived from historical art and texts, arguing Hollywood archery is not historical.

The official audio of Leonard Cohen's 'Everybody Knows' from the album I'm Your Man.

Smarter Every Day host Destin Sandlin tries to hover a helicopter and finds it very hard. The video shows how the constant coordinated corrections across several control axes feel at first and how learning makes them automatic.

A sketch from the British sitcom Yes, Prime Minister in which Jim Hacker and the chief scientific advisor discuss the logic of the nuclear deterrent.

The first chapter of 3Blue1Brown's Essence of Linear Algebra series, introducing vectors with animated geometric visuals. It begins a series that builds intuition for linear algebra from the basics.

A five-minute preview of 3Blue1Brown's Essence of Linear Algebra series, which uses animation to build geometric intuition for topics from a standard linear algebra course.

A compilation of molecular animations of DNA replication and gene transcription by Drew Berry and Etsuko Uno at WEHI, made with no narration. It shows molecular machinery at work inside cells.

The first part of Innuendo Studios' six-part video essay series on the online hostility around Anita Sarkeesian and GamerGate. It lays out the history and the motivations of the people involved.

A 10-minute 3Blue1Brown chapter explaining the determinant as the factor by which a linear transformation scales area or volume. It builds the idea geometrically with animations before any formulas.

Psychologist Melanie Joy's TEDxMunchen talk introduces carnism, the invisible belief system that conditions people to eat some animals but not others, and how it shapes reactions to food choices.

CGP Grey compares airplane boarding methods, based on an arXiv paper, and shows why the intuitive back-to-front approach is slow while random or outside-in boarding does better.

A short clip of Dr. Robert Zubrin, author of The Case for Mars, answering why humanity should go to Mars. He argues that societies grow by challenging themselves and that exploration inspires young people.

A 1930s Chevrolet training film explaining the principles and development of the differential gear. It builds the idea step by step from first principles to the finished mechanism.

A clip from the 2011 film Margin Call in which senior partners hold an emergency meeting and decide to sell off toxic assets immediately. It is set at the start of the 2008 financial crisis.

Practical Engineering explains why connecting solar and other inverter-based generation to the grid is hard. It covers grid stability, load balancing and the behind-the-scenes engineering challenges of renewables.