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P.S. You Should Know... | Issue #168

June 14 · Issue #168 · View online
P.S. You Should Know...
👋 Welcome back to P.S. You Should Know… probably the best newsletter published on Sundays between 6-7am CST, and definitely the best one published by me. Now in its fourth year!
Welcome new subscribers! I particularly enjoy hearing and learning from this community, so please never hesitate to reach out.

my story 🚀
Daphne turns 7 months; Petra enjoys diggers working, waterproof clothes, and dirt.
Daphne turns 7 months; Petra enjoys diggers working, waterproof clothes, and dirt.
🎓 I am grateful to live in the time of the internet. I recently read a science book about longevity. The book’s implications are profound–so profound that I chose to remain skeptical and search out dissenting scientific opinions on the topic. I have not had much success finding informed critiques. I came across comments from a professor in the field of aging who seemed to have a nuanced view, so I sent a cold email to solicit his opinion. I heard back from him – in 13 minutes –and he pointed me in a useful direction. What an incredible time to be alive!
someone else's words 💬
fun facts 🙌
The ancient Greek story of Phryne. “We don’t know for certain what exactly she was charged with or what she did to be charged… Whatever it was, the important fact is that if she was found guilty, Phryne would be executed. She was defended by one of her lovers, an orator named Hypereides, who came up with a defence that can only be described as genius.” | learn more
$30 million in cash for a domain name. Last year a blockchain company paid $30 million in cash for This is the most ever paid for a domain, by a lot. is in second place at $13 million. | learn more
The new banking reserve requirement: 0%. This happened a few months ago and it slipped right past me. Simplified explanation… There’s a “reserve ratio” that governs how much capital a bank must keep in reserve when it lends money. It was 10%, meaning $100 of capital allows the bank to lend $1,000. Now it’s 0%, meaning there’s no longer a ratio limit to the amount banks can lend. | learn more
oh, chicago 🏆
Chicago’s electric car charging stations, circa 1916. A hundred years ago, EV drivers could juice up at any of these 72 spots in the city (and a few more in the suburbs). | learn more
tech, startups, internet ⚡
How the biggest consumer apps got their first 1,000 users. “Below, you’ll find first-hand accounts of how essentially every major consumer app acquired their earliest users, including lessons from Tinder, Uber, Superhuman, TikTok, Product Hunt, Netflix, and many more.” | learn more
Online events are not good yet. Another insightful analysis from Benedict Evans. “Events are a bundle of content, networking and meetings, and aggregate people in one place at one time. When you try to take this online, half of it breaks and most of it makes no sense bundled together. We need new tools and new ways to think about networks, not ‘virtual conferences’.” | learn more
Sexy air conditioners are coming this summer. This was published in the WSJ Magazine, so you know it’s classy “Clunky, view-obstructing window AC units are a thing of the past. The new wave of companies offering well-designed, quiet—dare we say—cool replacements.” | learn more
better doing 🎯
22 slides showing that we are irrational. It’s always nice to see reminders of the many ways humans take mental shortcuts that aren’t economically rational. | learn more
Slow motion multitasking to boost creativity. “What if multitasking is a key to creativity, rather than a bad habit? Tim Harford explains how great minds like Darwin and Einstein multitasked for decades to unlock their biggest ideas.” I like the concept Hartford puts forth, but I dislike the name because I don’t believe ‘multitasking’ is a thing. | learn more
under the microscope 🔬
Why young blood rejuvenates old animals. Scientists have shown before that giving young blood to old animals has the, “rejuvenative effects of enhancing muscle repair, reducing liver adiposity and fibrosis, and increasing hippocampal neurogenesis.” In this UC Berkeley study, they tease apart exactly what about the young blood might be doing the trick. | learn more
AI-reconstructed medical images can’t be trusted. “A study published in the Proceedings of the National Academy of Sciences, however, finds that these AI algorithms have serious instability issues. Small structural changes, such as the presence of a small tumour, may not be captured, while tiny, almost undetectable perturbations, like those created by patient movement, can lead to severe artefacts in the final image.” | learn more
thoughts of food 🍔
Grubhub is merging with European counterpart. There’s consolidation happening in the online food business. Grubhub had been in talks with Uber but those broke down because of antitrust concerns. I think we’re coming to the tail end of the VC-sponsored discounts for consumers in this market. | learn more
on the blockchain ⛓
Civil shuts down. This blockchain company, founded in 2016, had a lofty mission to create more trustworthy journalism. My favorite local news source, Block Club Chicago, runs on Civil’s platform. “Our grand experiment did not achieve its mission, but we did succeed in bringing many people together around something radically different and in service of something deeply important.” | learn more
calls to action 👇
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