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3Blue1Brown visualizes Feynman's lecture on the refractive index, explaining why light appears to slow down in glass and why the effect depends on color. It builds the idea from waves produced by oscillating charges in the material.

Rhonda Patrick interviews Dr. Bill Harris, co-inventor of the Omega-3 Index and author of more than 300 papers on fatty acids. They cover EPA and DHA dosing, fish oil studies such as REDUCE-IT, and how omega-3 levels relate to health and longevity.

OpenAI's 2021 live demo of Codex translating natural language into code, from Hello World to building a game and a Microsoft Word plugin.

A through-the-lens comparison of the Oculus Quest 2, HP Reverb G2 and Valve Index, capturing what each headset's display actually looks like. It also previews a 90Hz mode coming to Quest 2.

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.

Michael Green of Thiel Macro presents a thesis that the growth of passive investing distorts how markets price new money flows. He ties short-term market behavior to longer-term demographic cycles and its effects on valuations and volatility.

Andreas Kling live-codes a prototype JavaScript JIT compiler for the LibJS engine used in SerenityOS and Ladybird. He builds a standalone bytecode VM, a simple interpreter, and then a simple JIT in about 80 minutes.

Sentdex demonstrates GAN Theft Auto, a GameGAN-based neural network that recreates GTA V so the network itself is the playable environment. He shows the results and releases the code.

Ben Felix rebuts common arguments for holding only US stocks, such as past outperformance and international revenue exposure. He supports the case for international diversification with cited academic research.

BobbyBroccoli documentary on the rise of Nortel Networks, once the dominant Canadian telecom giant, during the dot-com era. It is part one of a two-part story.

An Economics Explained video arguing that the Netherlands shows taxes alone can't reduce wealth inequality. It distinguishes income inequality from wealth inequality and discusses the Gini index.

A short Unitree promo for its G1 humanoid robot, priced from $16K, showing agile motion, dexterous hands and imitation and reinforcement learning.

Toyota Research Institute presents an approach for teaching robots new dexterous behaviors from human demonstration. It explains why this capability matters and what advances made it possible.