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🔥 Read this trending post from Hacker News 📖 📂 **Category**: ✅ **What You’ll Learn**: Ten years of DNS measurements reveal three trends across the Internet's most popular domains: email continues to consolidate around two providers, DMARC enforcement has hit a plateau, and a surprisingly large long tail of infrastructure defies easy classification. Almost everything about how a domain handles email is sitting in public DNS, waiting to be counted. The MX record says where the mailbox lives. The SPF record says who may send on the domain's behalf. The DMARC record says what should happen when a message fails…

✨ Check out this trending post from Hacker News 📖 📂 **Category**: 💡 **What You’ll Learn**: Strong gravitational lensing and microlensing of supernovae (SNe) are emerging as a new probe of cosmology and astrophysics in recent years. We provide an overview of this nascent research field, starting with a summary of the first discoveries of strongly lensed SNe. We describe the use of the time delays between multiple SN images as a way to measure cosmological distances and thus constrain cosmological parameters, particularly the Hubble constant, whose value is currently under heated debates. New methods for measuring the time delays…

🚀 Check out this insightful post from Hacker News 📖 📂 **Category**: ✅ **What You’ll Learn**: For the past few months, we’ve been developing all kinds of features for the future GIMP 3.4 release. We noticed recently that our changelog was getting quite long - a good problem to have! While there’s been a lot going on internally, it’s been a while since we made a public progress report. So we want to share details on some of the new features and UX improvements that’ll be available in the first development release, GIMP 3.3.2. This won’t be an exhaustive list (we…

✨ Check out this awesome post from Hacker News 📖 📂 **Category**: 📌 **What You’ll Learn**: Linear Algebra Done Right Sheldon Axler The fourth and most recent edition of Linear Algebra Done Right is an Open Access book available in English, Chinese, Farsi, Greek, and Portuguese. Other languages are coming soon. Electronic versions of this fourth edition, which has a Creative Commons BY-NC license, are legally availble without cost at the links below. The fourth edition of Linear Algebra Done Right contains over 250 new exercises and over 70 new examples, along with several new topics and multiple improvements throughout…

💥 Read this awesome post from Hacker News 📖 📂 **Category**: 💡 **What You’ll Learn**: Earlier this year, we explained why residents of the PJM area, America’s largest electricity market, have seen their power bills rise by ~20%. We argued that the main culprit was PJM’s auction design choices and how PJM models demand and supply. To better understand the extent of the problem, our Energy Model team spent the last 6 months reverse-engineering PJM’s main system model, the ‘Reserve Requirement Study’, which to date has been a black box. This study is how PJM decides what type of and…

🔥 Read this must-read post from Hacker News 📖 📂 **Category**: ✅ **What You’ll Learn**: Listen to the article 5 min This audio is auto-generated. Please let us know if you have feedback. Soon after President Donald Trump retook office, researchers and academics across the country began receiving startling news. They were abruptly informed, often mid-project, that their federal grant funding had been terminated. Form letters bearing the news often offered few details beyond that their work no longer aligned with agency priorities. As part of a lawsuit filed by University of California researchers, a handful of federal agencies confirmed…

💥 Explore this trending post from Hacker News 📖 📂 **Category**: 📌 **What You’ll Learn**: Gmail might partially be to blame for me receiving emails from other Sean Conners I was reading the Lobsters thread about the article “A researcher bought noreply.net. Companies started sending him secrets” when I left a comment about my own struggles with receiving emails for other Sean Conners. That started a thread that swamped the comment section about other people who had similar stories, so it's nice to know that I'm not alone. Also, here's one of my favorite comments in that thread (for reasons…

💥 Discover this trending post from Hacker News 📖 📂 **Category**: 📌 **What You’ll Learn**: Prolly publishes the prolly Rust library crate. Users depend on the package as prolly-map, while code imports stay concise: use prolly::🔥;. The crate provides content-addressed prolly tree storage primitives: an immutable, ordered key-value index over byte keys and byte values, with stable content-derived structure for efficient structural sharing, diff, merge, and bulk loading. At the API boundary, a Tree is a small persistent handle: root: Option points at the content-addressed root node. config: Config records the chunking and encoding parameters used by the tree. The…