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A PBS Space Time episode hosted by Gabe Perez-Giz on the nature of spacetime and whether space and time are fundamental. It builds up reference frames and causality in a short, dense format.

A tour of Christian Schallert's 24 square meter apartment in Barcelona, designed so that it looks like an empty cube until he builds the furniture he needs. Kirsten Dirksen shows how the space is transformed for cooking, sleeping and dressing.

The full webcast of SpaceX's Falcon 1 Flight 4, the first privately developed liquid-fueled rocket to reach orbit, on 28 September 2008. It includes the crew's cheering and Elon Musk's statement afterward.

A short SpaceX video of the Dragon 2 pad abort test, in which the capsule's thrusters fire to carry it away from the launch pad. It also shows the pad deluge system.

A Google Tech Talk by sleep researcher Dr. William Dement on healthy sleep and performance. He argues sleep debt must be repaid and describes the three characteristics of healthy sleep.

Andrew Huberman's podcast episode on what makes us sleepy, helps us sleep soundly and keeps us alert. It lays out the science and a set of behavioral tools such as light timing.

Commander Chris Hadfield performs a revised version of David Bowie's Space Oddity, recorded aboard the International Space Station. It was released as a music video in 2013.

SsethTzeentach reviews Space Station 13, the chaotic multiplayer game, by recounting absurd stories of singularities, malfunctioning AIs and plasma fires.

Video of the March 2014 Senate Defense Subcommittee hearing on National Security Space Launch programs. Elon Musk of SpaceX testifies alongside ULA's CEO, a GAO official and a policy expert, on launch contracts and Russian engines.

Berkeley sleep scientist Matthew Walker presents the science of sleep and dreams and how sleep affects health and lifespan, based on his book Why We Sleep.

Patrick Boyle analyzes SpaceX's IPO prospectus, covering its financials, speculative products, AI business, related-party dealings, compensation, and a governance structure with minimal shareholder rights.

Urban explorers break into the Baikonur cosmodrome in Kazakhstan to film the abandoned Soviet Buran space shuttles. The video shows the decaying orbiters and the dangerous trip to reach them.

A TED conversation with SpaceX president Gwynne Shotwell about the company's race to put people in orbit and the BFR rocket. It also covers the idea of using the rocket for fast point-to-point travel on Earth.

Scott Manley explains the thermal balance of spacecraft and how a satellite could be configured to radiate away the heat from datacenter-scale computing in space. His rough numbers suggest it is feasible.

The Quantified Scientist, a sleep researcher, tests Apple Watch sleep tracking against a research-grade Dreem 2 headband, comparing accuracy for sleep stages, deep and REM sleep. The review is data-focused rather than feature-focused.

Theoretical physicist Nima Arkani-Hamed gives a public talk on why spacetime may not be fundamental and what might replace it, including newer approaches to scattering amplitudes.

Essential Craftsman follows up on his earlier video about a DIY approach to sleep apnea. It centers on forcing nose breathing during sleep with mouth taping and nasal strips, and says to seek medical guidance.

Thunderf00t's critique of SpaceX's claims, arguing its launches are not actually cheaper than competitors or the Space Shuttle. It questions the economics of reusability.

A clip of Sandy Munro, a veteran automotive engineer, describing his visit to a SpaceX Starship design review and meeting Elon Musk. He says he was struck by how deeply Musk is involved in engineering.

USLaunchReport footage of the September 2016 SpaceX Falcon 9 static fire anomaly that destroyed the rocket and AMOS-6 satellite at Launch Complex 40.

A PBS Space Time episode explaining how space and time swap roles inside a black hole's event horizon. It is part of the channel's black hole series.

Kurzgesagt explains how accumulating space junk could trigger a collision cascade (Kessler syndrome) that makes launches too dangerous and traps humanity on Earth.

Bret Copeland, in an astronaut costume, gives an energetic talk on how the Space Shuttle landed from orbit, including reentry and the unpowered glide. It includes real-time landing footage with HUD and audio.

Isaac Arthur explores space-based solar power, in which satellites beam energy down via microwaves to rectennas on Earth. He discusses feasibility, profitability and its role in spurring space colonization.

Patrick Boyle examines SpaceX's planned IPO at a roughly $1.75 trillion valuation. He covers the merging of other Musk companies, orbital data center claims and the fast-track index rules that may help the listing.

In her final days as ISS commander, Sunita Williams gives an extensive tour of the station's modules and research facilities, narrating the work done aboard.

Joe Scott takes a serious look at space sunshades as a climate fix, asking how big they would need to be, what they would cost and whether they would work. He draws on Roger Angel's paper and launch options.

Scott Manley tries a Space Shuttle Return To Launch Site abort in the Orbiter simulator without manuals or checklists. He explains how the maneuver works and where his attempt went wrong.

A two-minute clip of the printer-smashing scene from the film Office Space, set to its rap soundtrack. The uploader assembled it as a cleaner version.

EEVblog's Dave Jones critiques Reflect Orbital's plan to sell sunlight to solar farms after dark using orbital mirrors. He walks through the numbers to show the idea does not work out.

PBS Space Time explains the quantum eraser experiment, in which erasing which-path information appears to reverse causality in a double-slit setup. It discusses what this means for quantum mechanics.

A PBS Space Time episode asking what matter, mass, and energy really are, starting with inertial versus gravitational mass and what mass-energy equivalence means.

PBS Space Time introduces Miguel Alcubierre's warp drive, explaining how spacetime itself could be warped rather than moving a ship through it, and whether it is physically possible.

PBS Space Time explains what happens as you approach and cross a black hole's event horizon, using Penrose diagrams and light cones as the tool for understanding spacetime there.

PBS Space Time explains the Higgs field and how the Higgs mechanism gives particles mass within quantum field theory. It is a ten-minute overview for a lay audience.

NASASpaceflight's 24/7 live stream from SpaceX's Starbase in Boca Chica, Texas, showing Starship and Super Heavy development, testing and launches.

Joe Barnard of BPS.space shows his model rocket Scout F landing vertically like a SpaceX booster after seven years of attempts. The video documents the successful landing and the build-up to it.

A stand-up routine by Stewart Lee on political correctness, offering a satirical defense of inclusive language.

SpaceX engineers present at NVIDIA's GPU Technology Conference on a multi-physics code that simulates the full-scale Raptor methane engine. It covers GPU-based turbulent combustion modeling with adaptive grids and wavelet compression.

Sasha Rush surveys linear RNNs and state space models as replacements for attention in transformer-style models, in a talk for MLSys. It covers the foundational preliminaries and predates Mamba.