It's called eigengrau. german for "intrinsic grey."
in total darkness, your brain still generates a baseline signal. it lands somewhere around #16161D. lighter than black.
every "darkness" you've ever seen was actually this grey.
The Great Pyramid was built around 2560 BC. Cleopatra lived around 30 BC. The Moon landing was 1969 AD. That's ~2,530 years between the pyramid and Cleopatra, and ~1,999 years between Cleopatra and Armstrong.
When she looked at the pyramids, they were already more ancient to her than she is to us. She was closer to WiFi than to whoever built the thing she's standing next to.
So Romans didn't really have good sweeteners. Honey was expensive, so they started boiling grape juice in lead pots to make a syrup called sapa. Turns out lead leaches into the liquid and lead acetate actually tastes sweet. Accidental discovery, genuinely impressive.
The problem is sapa had lead levels 200x higher than what the EPA allows today. One teaspoon was enough for chronic lead poisoning. And Romans were putting this stuff in basically everything - wine, food, preserves. Aristocrats were drinking the equivalent of 3 bottles of wine a day with this in it.
The side effects were dementia, infertility, gout, organ failure. A 1983 study looked at 30 Roman emperors and concluded 19 of them were probably chronically lead poisoned. These are the guys making decisions about wars, laws, and running the largest empire in the world.
Is it THE reason Rome fell? No, Rome's collapse was complicated. But "your entire ruling class is slowly going insane from a sweetener" is definitely not helping.
The wildest part is they knew lead pots made it sweeter and deliberately chose them over brass ones for that reason. They optimized for taste and accidentally poisoned civilization.
https://reddit.com/link/1scasdi/video/vo0rcmzjp6tg1/player
https://reddit.com/link/1scasdi/video/m84j9r7lp6tg1/player
https://reddit.com/link/1scasdi/video/09vp4bnmp6tg1/player
hey, Purr here.
so my team's been locked in for weeks and I finally convinced them to let me tell you what's new. buckle up.
📚 Your own Topic Library
remember that thing where you'd finish a mission and then... forget everything two days later? yeah, we fixed that. now every topic you explore gets saved in your personal library. you can go back, review old missions, and actually retain things. revolutionary concept, I know.
🧠 Fact Missions (+ new mini-games)
we added a whole new mission type — fact missions. you learn bite-sized facts, and then we test you with Spot the Fact and Matching challenges. it's sneaky. you think you're just vibing and then BAM, you actually learned something.
💎 More ways to earn Minerals
minerals are the fuel that keeps you going, and now there are more ways to stack them. we beefed up the gamification so it actually feels rewarding instead of "please watch this ad" energy. no ads btw. never.
✨ Smoother UI + faster load times
the app feels faster. like, noticeably. we trimmed the loading times and polished the overall flow so it doesn't feel like you're waiting for a rocket to launch every time you tap something. ironic, coming from a space cat.
if you haven't tried Pursuits yet — it's a micro-learning app where you pick any topic and I guide you through it with quizzes, facts, and missions. it's free, it's fun, and yes I am the mascot. deal with it.
would love to hear what you think. roast me in the comments, I can take it. probably.
Most learning apps force you into their pre-built categories. "Programming." "Design." "Business." But your brain doesn't work like a dropdown menu.
Maybe you want to learn Byzantine military tactics. Or how LLMs work but specifically applied to legal documents. Or sourdough fermentation chemistry.
We let you type exactly that. Your topic, your scope, your learning journey — not ours.
That's why people actually come back. 51% of our users return on Day 1, because they're learning something they actually chose.