travel

A PBS Space Time episode explaining why faster-than-light travel is equivalent to travelling back in time, using relativity and Minkowski diagrams for different observers.

Sabine Hossenfelder explains why she thinks faster-than-light travel may not be ruled out. She argues that the standard objections from special relativity are inconclusive.

The official music video for Blues Traveler's song Hook, remastered in HD. The song is known for using the melody of Pachelbel's Canon while its lyrics comment on how hooks work.

PBS Space Time surveys five realistic options for interstellar travel, from conventional rocket fuel to antimatter and nuclear pulse propulsion. The options rely only on known physics.

Dan Abramov live-codes hot reloading with time-travel debugging at React Europe 2015, debuting Redux and its devtools. The slides themselves are driven by application state.

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.

Two Australian YouTubers travel to North Korea and get a haircut while examining how Western media sensationalizes stories about the country.

An SNL sketch in which Adam Sandler plays a tour operator who bluntly clarifies what his Italy tours can and cannot do for customers' lives.

Ed March rides a Honda C90 through Iran on his journey from Malaysia to the UK, showing the country and its people. He argues Iran is far more welcoming than the press suggests.

Kurzgesagt explains why, even with science-fiction technology, most of the universe is permanently out of reach because of cosmic expansion and finite resources.

Evan Czaplicki's Strange Loop 2014 talk surveys the many formulations of functional reactive programming and how they relate historically and theoretically. It then shows how Elm's variant enables hot-swapping and its time-traveling debugger.

Allan Blomquist demonstrates the internal programming and debugging tools Tomorrow Corporation uses to make games, including live modification of a running game and time-travel debugging.

Vice founder Shane Smith travels to North Korea, speaking with refugees in South Korea before crossing the DMZ. It is part one of a three-part documentary with rare on-the-ground footage.

A travel vlogger asks the leader of the Hadza hunter-gatherers in Tanzania some big life questions just before a baboon hunt. The short answers touch on meat, honey and what matters in life.

A five-minute 4K 60fps HDR travel montage of Costa Rica by the Mystery Box video team. It is a remastered version of their popular scenic footage.

A short Louis CK stand-up bit about complaining on airplanes, about how people take the miracle of flight for granted.

Astrophysicist David Kipping presents the halo drive, a proposed way to propel a starship to a good fraction of light speed by gaining energy from a black hole. The video is based on his peer-reviewed paper and explains why energy is the main obstacle to interstellar flight.

Paolo fromTOKYO explains why foreign tourists get arrested in Japan, covering strict laws and the justice system's very high conviction rate.

Bret Victor's talk from Dropbox's DBX conference about living by a guiding principle, in his case that creators need an immediate connection to what they are making. He shows live-coding and time-manipulation demos that let ideas take form at the speed of thought.

Everyday Astronaut's guide to visiting Starbase, Texas to see Starship, covering what and where it is, which areas close during launches, where to watch from, where to fly into and stay, and things to do.

A three-minute minutephysics video on the orbital mechanics of why crashing into the Sun takes far more energy than leaving the solar system.

ITS Tactical demonstrates how a ballpoint pen can open a zippered suitcase without leaving a trace, bypassing its lock, and suggests countermeasures.

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.

Wendover Productions explains how airlines make money from different cabin classes and why premium seats matter so much to profits. It also touches on how this shaped decisions such as the decline of supersonic travel.

Thunderf00t, a physicist, critically assesses the Hyperloop concept, covering the vacuum, pressure, safety, and cost problems of high-speed tube travel. He argues the media accepted the claims uncritically.

AlphaPhoenix uses a custom high-speed measurement setup to watch voltage waves travel down wires and split at a fork. It answers how electricity knows where to go and how quickly that process happens.

3Blue1Brown builds toy SIR models to simulate how an epidemic spreads and tests scenarios like social distancing, travel restrictions, central gathering places and quarantine. It was made during the early COVID-19 outbreak.

A short clip of Steve Jobs describing the computer as a bicycle for the mind. He compares human efficiency of travel to what computers do for mental work.

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.

Tim Hutton's demonstration of SmoothLifeL, a continuous version of Conway's Game of Life using floating point values. It shows gliders traveling in any direction, rotating pairs, and elastic cord-like structures, with config details to run it yourself.

Wendover Productions explains why modern airliners fly no faster than they did decades ago, covering the economics of speed and fuel efficiency, and why supersonic travel faded.

Veritasium explores how electrical energy actually travels in a circuit, arguing that it flows through electromagnetic fields around the wires rather than through the electrons. It builds a long-cable experiment with Caltech to test when a distant bulb lights.

A short Veritasium video showing how far a backspinning basketball would travel dropped off a dam. It demonstrates the Magnus effect and links to Flettner rotor ships and aircraft.

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.

Veritasium investigates whether a wind-powered vehicle can travel directly downwind faster than the wind, driving the Blackbird craft himself. The video explains the physics behind a claim some physics professors dispute.

Scotty Allen of Strange Parts travels through Shenzhen's Huaqiangbei markets and learns to upgrade an iPhone 6s from 16GB to 128GB by swapping its flash chip. It is part 3 of his custom iPhone series and shows the difficulty of the hands-on repair work.

Permaculture instructor Andrew Millison travels with the UN World Food Programme to Niger to see land recovery within the Great Green Wall, where rainwater harvesting is boosting food security and restoring the ecosystem.

Veritasium recounts a $10,000 bet with a UCLA physics professor over whether a vehicle can travel downwind faster than the wind. He presents the professor's reasoning and demonstrations, including one without aerodynamics.

A minutephysics explainer on the twins paradox in special relativity. It shows why the traveling twin ends up younger and how acceleration resolves the paradox.

A clip of Louis C.K.'s bit "Everything's Amazing and Nobody's Happy," about how quickly people take modern technology for granted and complain about it. It is a comedic riff on impatience with air travel and gadgets.