10 Things in Tech: Mark Zuckerberg and Jeff Bezos are ripped, tech workers work less than 4 hours per day, and tech's Texas real-estate invasion

It's the last day of Asian American and Pacific Islander Heritage Month, friends. I'm Diamond Naga Siu, and today, I'm thinking about Sweden.

A 30-year-old consultant said moving there from California helped cure her burnout. And she told my colleague Hannah Towey how she rarely works overtime, gets six weeks of paid vacation, and got a free master's degree.

Sounds pretty sweet to me. Plus, I'm pretty fascinated by this Swedish carmaker's plan to become the Ikea of EVs. Luvly's model for urban environments only costs around $11,000, and you can get a 360 look at it here.

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Now, let's dive into today's tech.

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1. The 50 books used to train ChatGPT. OpenAI, the company that created the chatbot, won't share the books it used to train ChatGPT. But a group of researchers discovered a method of quizzing the chatbot to figure out which books it has read.

• Training material for ChatGPT is important, as it shapes how the chatbot answers questions. Reading helps mold people's worldviews. And similarly, ChatGPT's reading list gives people a sense of its perspective.
• Their findings revealed a variety of classics (think "Moby Dick" and "The Scarlet Letter"), a few popular classics (like Harry Potter and Sherlock Holmes), and a staggering amount of sci-fi and fantasy (including "A Game of Thrones" and "The Hitchhiker's Guide to the Galaxy").
• My colleague Adam writes that ChatGPT's emphasis on sci-fi means it's a nerd, and he examines how this impacts its frame of reference.

Dive into the chatbot's perspective and get the full list here.

In other news:

2. Welcome to the "Wild West" of tech real estate. Texas is turning into a playground for tech developers. Thanks to its lack of regulations, tech companies have turned rural areas into industrial hubs. Enter the lawless land here.

3. Mark Zuckerberg and Jeff Bezos are ripped. Over the weekend, Zuck revealed his bulking methods. Check out how the gym-rat celebrated Memorial Day. Plus, Bezos also went from scrawny to brawny. Follow his fitness journey here.

4. Your next job probably depends on AI. ChatGPT and other AI tools have the potential to upend most industries as we know it. So regardless of the role or industry, AI skills will likely determine whether you get hired. Peek into the future job hunt here.

5. Pool-rental app Swimply is making neighbors angry. It lets homeowners rent out their private pools to people. But partying guests are a "tremendous nuisance" to neighbors. Swim over for the story here.

6. Many tech workers are only productive for four hours per day. In an anonymous poll, nearly 45% of tech workers said they spent four hours (or less) on "focused work." Only around 25% said they worked eight or more hours per day. More on the poll here.

7. NASA released stunning new images of space. They show the universe in dazzling detail: two of them are galaxies, one is a nebula, and another is a star cluster. Check them out.

8. Quality issues pushed this YouTuber to swap his Tesla for an electric Mercedes. Austin Evans sold his family's Model Y after he got fed up with some quality concerns. Evans shared how the Mercedes felt like a private jet. The full story.

Odds and ends:

9. A video shows a US spy plane rattling after a Chinese fighter jet cuts it off. The Chinese aircraft flew right in front of the US plane's nose. This forced it to fly through rough turbulence. Such behavior could cause a major incident, Pentagon officials warned. Watch the full video.

10. Meet the average US millennial. Born between 1981 and 1996, millennials are better off financially than they were five years ago. The average US millennial is a parent, homeowner, and worth around $128,000 (but hoping for student-debt relief). Get their full profile here.

What we're watching today:

• Apple's award-winning show "Ted Lasso" will release its third (and final) season.
• CloudFest, an internet infrastructure event, kicks off today in Austin. Speakers include leaders from Wikipedia, WordPress, and GoDaddy.
• Quarterly earnings for Salesforce and other companies. Keep up with earnings here.
• Happy birthday, Normani — That's My Girl.

Curated by Diamond Naga Siu in San Diego. (Feedback or tips? Email dsiu@insider.com or tweet @diamondnagasiu) Edited by Alistair Barr (tweet @alistairmbarr) in San Francisco and Nathan Rennolds (tweet @ncrennolds) in London.