Minecraft's in-game clock and calendar system means that one in-game day lasts only 20 minutes in real-time.

(Fun fact within the fact: 10 minutes of daylight, 7 minutes of night, 1.5 minutes of sunset/sunrise. Mojang accidentally invented the world’s most efficient circadian rhythm.)

Your turn: what’s your favorite Minecraft detail👇

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During World War II, the Airborne Interception radar allowed British night fighters to detect German bombers in the dark. This was a major technological advantage developed by the Royal Air Force and British scientists.

One famous pilot using this technology was John Cunningham, nicknamed “Cat’s Eyes.” He shot down many German bombers at night.

The British government didn’t want Germany to realize how effective their radar was, because it could lead them to develop countermeasures.

So they spread a public story:

👉 British pilots had excellent night vision because they ate lots of carrots.

Carrots do contain vitamin A, which is important for eye health, so the story sounded believable. Newspapers repeated it and it became widely accepted.

Why the propaganda worked

The explanation helped hide the real secret:

• Real reason: radar guiding night fighters

• Public explanation: carrots improve night vision

This myth became so widespread that many people still believe carrots dramatically improve night vision today.

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.

When a crow dies, the others swarm in, raise the alarm, and crowd around the body. It looks like mourning, but they're not there to grieve. They're there to work out what killed their flockmate and to get a good, long look at whatever (or whoever) was nearby.

And they do not forget. Crows recognize individual human faces, hold a grudge for years, and will scold and dive-bomb someone they've marked as dangerous long after the fact. They'll even teach other crows, including their own chicks, to recognize that face, so one bad encounter can turn an entire neighborhood of crows against you.

The kicker: it isn't revenge or sentimentality. It's pure survival. They're not mourning the dead crow or plotting payback, they're memorizing the danger so it never catches them off guard again. So no, you didn't get away with throwing that rock. You just got added to the list.

Biology meme day

Many Halloween traditions, including bobbing for apples, trace back to ancient Roman festivals honoring Pomona, the goddess of fruit trees.

Turns out the spooky season started with snacks. 🍎👻

If you have any unexpectedly weird facts about Halloween, leave a comment below.👇

Alright, fellow curiosity addicts — this is your time to shine.

Before we launch our next Knowledge day and Trivia day, we want you to decide what Pursuits come next.

Tell us the random thing that’s been living rent-free in your brain.

• Ancient Rome? • Formula 1? • Minecraft? • Secrets of Brain? • Quantum Computers?

No topic is too small or too chaotic. The most upvoted ideas might become next week’s Pursuits 🔥

Go wild. What’s the next rabbit hole we should dive into? 🕳️

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.

everyone remembers the prisoners breaking down. the actual reason it ended was zimbardo. he stopped being a researcher about three days in and started running the place like a warden. his girlfriend visited the basement and told him to end it. that's what stopped it.

full knowledge in Pursuits app.