The Daily Index — Tuesday, July 15, 2025 · TLDR Index

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glean.com

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HOW DOES A SCREEN WORK?

Modern computing isn't possible without digital displays. The technology is underappreciated because most people have no idea how the technology works. This article covers the history of digital displays, how different types of displays work, what pixels are and why we use them, and much more. Understanding how a screen works unlocks a lot of understanding of how color works on digital displays, rasterization, GPUs, and shaders.

makingsoftware.com · 24 min

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META CEO ZUCKERBERG SAYS FIRST AI DATA SUPERCLUSTER WILL COME ONLINE IN 2026

Meta plans to invest hundreds of billions of dollars into artificial intelligence compute infrastructure. It aims to bring its first supercluster online next year. Meta has been on a multibillion-dollar AI hiring spree in recent weeks. CEO Mark Zuckerberg reportedly grew frustrated with Meta's progress in AI, so he is revamping the company's approach to better compete with rivals like OpenAI and Google.

cnbc.com · 2 min

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TIKTOK OWNER BYTEDANCE IS REPORTEDLY BUILDING ITS OWN MIXED REALITY GOGGLES

ByteDance is reportedly working on mixed reality goggles designed to layer digital objects over users' view of the real world to compete directly with Meta's upcoming mixed reality products. They will be built by ByteDance's Pico, the creators of the Pico 4 VR headset. Pico will keep the device lightweight by offloading most of the computing work to a puck connected to the goggles over a wire. Current Pico headsets aren't sold in the US, and ByteDance may face pushback over a US release due to its ownership of TikTok.

engadget.com · 2 min

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FIRST LOOK AT GEMINI SPACE

Gemini Space, which shows contextual cards on the lock screen and other places, currently only displays sports and birthday cards, but finance and Daily Hub features are expected in the future.

androidauthority.com · 2 min

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IPHONE 17 MAY SEE 'SIGNIFICANT' DYNAMIC ISLAND CHANGES

Apple appears to be committed to making the Dynamic Island more functional and integrated, turning it into a key element of the user experience.

macrumors.com · 1 min

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ELON MUSK FLOATS A NEW SOURCE OF FUNDING FOR XAI: TESLA

Tesla shareholders will soon be voting on whether to invest in xAI.

links.tldrnewsletter.com · 4 min

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LLM DAYDREAMING

Despite their vast knowledge and high benchmark scores, no large language model has made a major breakthrough or unexpected insight - this post discusses a theoretical method for making models more insightful.

gwern.net · 15 min

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COGNITION, MAKER OF THE AI CODING AGENT DEVIN, ACQUIRES WINDSURF

Google recently hired away Windsurf's CEO, co-founder, and research leaders but left most of the startup's 250-person team behind.

techcrunch.com · 5 min

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HOW GLP-1S ARE BREAKING LIFE INSURANCE

A person purchasing health insurance while on GLP-1 drugs may be assessed at the same level as someone at the same health level who isn't on the drug, but the person on GLP-1 is likely to return to their previous state of health within two years of stopping the medication.

glp1digest.com · 7 min