Harvard and MIT just built an AI simulation containing 8.3 billion virtual people, roughly the entire population of Earth.
They call it MatrAIx.
It is a population-scale digital simulation infrastructure powered by frontier models like GPT and Claude.
They mapped out an insanely detailed dataset called Persona 8B. It contains 8.3 billion unique digital profiles.
Every single persona is defined across 1,290 categorical dimensions.
Backgrounds, psychology, spending habits, behavioral quirks, technical literacy, and lifestyle.
They didn't just build a database of stats. They brought them to life.
The researchers dropped these billion persona agents into four distinct digital environments:
• Surveys
• AI chat interfaces
• Live web browsing
• Native desktop and mobile apps
Then they tested how this digital Earth reacted to real-world products, software updates, and pricing shifts.
The system recorded everything: how long an agent hesitated after a price increase, when they abandoned a broken checkout flow, and how much latency they would tolerate before closing an app.
When researchers tested persona adherence, the AI agents successfully maintained their assigned psychological and demographic behavior 91.5% of the time.
Think about what this means for the future of business.
You no longer have to wait weeks for a market research firm to tell you if a product feature will fail.
You can simulate how 8 billion different types of humans will react to it in real time, overnight, on a single server.
@angelainter_13@interiorgob@ManuSanchezG Angela nos somos hermanos, italiano y espanol somos lo mismo. La melodia hecho esa medida porque 1 necesita ponerse fuerte hasta la opinion publica Italiana 2 porque lo que ocurrio in Ceuta nos da miedo
To put Russia's appetite for more land into the context it deserves by showing what they've done with the apparently insufficient land they already have, I decided to combine all my old and new travel guides through Russia's very posh cities into one colossal final thread.🧵
¡ESCÁNDALO EN TURQUÍA! 🚨🇹🇷
Un gol de Fernando Muslera está siendo investigado en medio del presunto caso de amaño de partidos que sacude al fútbol turco.
⚽️ Todo apunta al penal que convirtió el arquero uruguayo en la victoria 3-0 del Galatasaray sobre Kayserispor, el 18 de mayo de 2025.
🤝 Según las acusaciones, ese penal habría sido pactado para beneficiar una apuesta con una cuota de 130.00, aprovechando que era el guardameta quien ejecutaría el lanzamiento.
💰 La investigación también señala que Maruf Güneş, vicepresidente del Galatasaray, habría apostado 5 millones de euros al gol de Muslera y utilizado las supuestas ganancias para ayudar a financiar el fichaje de Victor Osimhen.
👀 El caso continúa bajo investigación y promete sacudir aún más al fútbol de Turquía.
Vikings did use oars in shallow waters, but they weren't some exceptional rowers.
The best medieval rowers were Venetians and other Italian maritime republics, mastering the extremely difficult "alla sensile" method of rowing where 3 rowers per bench each had their own oar.
Papal States would have some good football players too.
This is an all-time greatest 11 football players who would be eligible to play for Papal States at its greatest territorial extent.