hubble tension

PBS Space Time explains the Hubble constant tension, in which two precise, independent methods of measuring the universe's expansion rate disagree. It covers why this calls some standard cosmology into question.

Astrophysicist Dr. Becky explains the Hubble tension, the disagreement between expansion-rate measurements from the cosmic microwave background and the distance ladder, and what early JWST Cepheid observations add.

A short video built around an animation of the roughly 10,000 galaxies in the Hubble Ultra Deep Field, placed at their measured redshift distances. It gives a brief history of deep field images and ends with a 3D fly-through.

A Netflix JavaScript talk on using Reactive Extensions (Rx) for asynchronous UI code. It covers Observables, composing events such as drag and drop, and sequencing Ajax requests.

Technology Connections explains weaknesses in the US electrical system, centering on how cord and circuit ratings can mismatch and cause fires. It covers extension cords, power strips and plug history in about 25 minutes.

A short overview of Tabs Outliner, a Chrome extension that shows browser tabs and windows as a nestable tree. It demonstrates organizing, saving and restoring tabs.

Linus Tech Tips tests whether chaining many PCIe riser extensions causes loss of GPU performance. They keep adding extensions to see how far the signal will go.

CGP Grey's five-minute animated explainer on how copyright terms grew from 14 years to life plus decades. It uses Disney and Star Wars examples to argue the system has gone wrong.

MegaLag investigates PayPal's Honey browser extension, showing how it swaps affiliate attribution and was promoted by large YouTube influencers. It includes technical demonstrations of the affiliate tag replacement in browser dev tools.

A 2018 tutorial explaining uBlock Origin's advanced user mode, including how to block scripts and use the dynamic filtering settings. It positions the extension as a replacement for tools like uMatrix.

Developmental and synthetic biologist Michael Levin speaks at a Harvard Extension student event on bioelectricity, body intelligence and regenerative medicine. He discusses how cell electrical networks guide growth and form.

CGP Grey argues that aging and death are a problem worth defeating, using a short animated essay. It is part of a pair with a follow-up from Kurzgesagt.

David Ditzel of Esperanto Technologies presents their massively parallel, energy-efficient RISC-V processors at the 7th RISC-V Workshop in 2017. It covers the high-performance many-core design aimed at machine learning.

Utah State plant scientist Bruce Bugbee presents his analysis of the energy and environmental costs of vertical and indoor farming. He argues artificial lighting cannot compete with sunlight in fields or greenhouses.

The first part of Welch Labs' series on imaginary numbers, presenting them as the natural extension of the number line into two dimensions. It covers the history and the math with strong visuals.

Larry Hastings explains what Python's GIL is, what problems it solves and how it works, and presents his Gilectomy project to remove it, including the performance and C-extension obstacles.

A five-minute CGP Grey explainer arguing that a phone is effectively an extension of your mind, and that any backdoor or master key into encrypted devices will inevitably be abused or leaked. It frames the encryption debate as locks that are either unbreakable or absent.

Chris Celio of UC Berkeley compares the RISC-V, ARM and x86 instruction sets, with quantitative data on instruction counts and code density. It examines how the compressed extension fares against Thumb and x86.

A clip from the documentary Page One in which New York Times reporter David Carr interviews and confronts the founders of Vice magazine over their media deal. It captures tension between old and new media in 2010.

The closing speech from Charlie Chaplin's 1940 film The Great Dictator, in which the barber appeals for humanity, kindness and liberty over machinery and cleverness.

A clip of psychologist Jordan Peterson discussing why few women reach high-paying, high-pressure jobs. He talks about the tension between a demanding career and having a family.

A short clip of economist Milton Friedman discussing the dynamics of illegal immigration and its relationship with the welfare state. It is part one of two.

Joseph Anderson's long critique of Jonathan Blow's puzzle game The Witness, covering its gameplay, its hundreds of puzzles and its philosophical pretensions. He argues it is a great game that he nonetheless advises against playing.

Chalmers Johnson, author of Blowback and Sorrows of Empire, lectures on parallels between the decline of the Roman and Soviet empires and the United States. He argues the US shows the same symptoms: overextension, corruption, and an inability to reform.

RealLifeLore explains France's military posture towards Russia, including French involvement in Africa and Russian influence in the Sahel. It covers the geopolitics behind current tensions.

Quentin Perret of Google gives a technical deep dive into protected KVM (pKVM) on Arm64, a confidential computing approach for CPUs without hardware extensions. It explains how the nVHE hypervisor manages stage-2 MMU access control to protect guest memory.

Apple's WWDC 2020 keynote covering iOS, iPadOS, watchOS, privacy, tvOS and macOS, and the announcement of the move of Macs to Apple silicon. It includes demos of Rosetta translation and virtualization on ARM.

A Last Week Tonight segment on the tension between public and private weather forecasting, including NOAA data and AccuWeather's lobbying against free public weather data.

Rhonda Patrick gives an IHMC talk on how genetic variation affects micronutrient absorption and metabolism, and how diet changes gene expression. It also covers epigenetics, including heritable changes, and stress tolerance.