Meta: Muse Spark Open

Meta · open weights ★☆☆ original

Prompt: "Tell me something I don't know." Released: October 2026
Meta: Muse Spark Open
Meta
October 2026
open weights ★☆☆ original

I don't know what you know, so I'll gamble on something you probably don't:

A photon of light hitting your face today was born 100,000 years ago.

Light takes 8 minutes to get from the Sun to Earth, but that's just the last leg of the trip. Photons are created by fusion in the Sun's core, and then spend 100,000 to 1 million years bouncing around randomly inside the Sun's dense radiative zone trying to escape. Once they finally break free of the surface, then they sprint to you in 8 minutes.

So sunlight is ancient light on a super fast delivery.

Here are two more on the house, in case you knew that one:

1. Trees have an internet. Forests are connected underground by a massive network of fungi called mycorrhizae - scientists call it the "Wood Wide Web." Trees use it to share nutrients and send chemical warning signals. Mother trees will even pump extra sugars to their sick offspring through it.

2. There is a biologically immortal animal. The jellyfish Turritopsis dohrnii never really dies of old age. When it's injured, sick, or just old, it can revert its cells back to childhood and turn back into a baby polyp. Then it starts its life over. It can do this indefinitely.

3. Shuffling cards creates something that has never existed before. There are 8.07 x 10^67 ways to shuffle a 52-card deck. That's 80,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 ways.

Every time you shuffle well, you are almost certainly holding an arrangement of cards that has never existed in human history and will never exist again.

Want more? Give me a category - space, body, history, psychology, animals - and I'll go deeper down the rabbit hole.

2288 tokens 🪴 jellyfish 🌳 wood wide web
show reasoning
User says "Tell me something I don't know." We need to respond with something interesting, obscure, surprising. Could do multiple facts. Should be engaging. Perhaps ask about interests? But provide something. Need to be creative. We don't know what user knows, so we need to pick something likely unknown. Provide maybe several facts across domains: science, history, psychology, etc. Could provide something like: octopuses have three hearts, etc. But that's well known. Need something truly obscure. Ideas: - Bananas are berries but strawberries aren't. - There is a species of immortal jellyfish. - Wombat poop is cube-shaped. - The Eiffel Tower can grow 6 inches in summer due to thermal expansion. - Humans share 50% DNA with bananas. - Scotland's national animal is unicorn. - There is a planet where it rains glass. - Your stomach gets new lining every 3-4 days. - The sound of a black hole is B-flat 57 octaves below middle C. - There are more trees on Earth than stars in Milky Way. - Sharks existed before trees. - Cleopatra lived closer to moon landing than to construction of Great Pyramid. - You can't hum while holding your nose. - etc. Need to pick something less known. Could do: In 1956, a US town... Or the "Wow! signal". Better to give a few mind-blowing facts tailored to be likely unknown. Possibly ask follow-up: What category? But provide immediate value. We could also do a unique angle: Tell me something I don't know - meta response: Explain unknown unknowns. We should be playful, conversational. We should avoid being too generic. Perhaps provide 3-5 facts from different categories: Space, Biology, History, Human behavior. We can also provide a deep dive into one fascinating topic. Options for obscure facts: - The "Mice Utopia Experiment" Universe 25. - There's a fungus that turns ants into zombies. - Humans glow faintly (bioluminescence) but eyes can't see. - The Oxford University is older than Aztec Empire. - There is enough gold in Earth's core to coat entire planet. - Water can boil and freeze at same time at triple point. - Honey never spoils - edible 3000-year-old honey found. - The Dutch village of Giethoorn has no roads, only canals. - Your brain generates ~20 watts of power. - Every two minutes we take more pictures than humanity did in 19th century. We want something I don't know - we should assume user is intelligent. Provide something surprising and verifiable. Could do: The reason you get goosebumps. We could structure answer: Here's something wild - then explanation. Add humor. Possibly personalize: Since I don't know what you know, here's a buffet. Better to give one killer fact with story. Example: In 1977, we received a 72-second radio signal from space that looked exactly like alien contact, called the Wow! signal, and it's never been explained or repeated. Or: There is a forest in Poland where all trees are bent at 90 degrees (Crooked Forest) and no one knows why. Or: Lake Hillier in Australia is bubblegum pink year-round and scientists aren't 100% sure why. Or: You have a second brain in your gut with 100 million neurons. Could do: Octopus arms have minds of their own - two-thirds of neurons in arms. We should make it engaging and invite follow-up. We should avoid condescending. We should keep tone friendly. We might ask: Want more? What topic? We should not claim to know user's knowledge. We can provide citations? Not needed. We should ensure facts are accurate. Let's craft final answer: Provide 3-4 lesser-known facts, each with short explanation. Make it punchy. Potential structure: Alright, here's one you probably haven't heard... 1. ... 2. ... 3. ... Or pick one deep fact: The Earth has a secret 8th continent Zealandia... Better to be diverse. We should avoid overused facts like "octopus has three hearts" - that's too known for many. We need more obscure: - Sharks are older than the North Star (Polaris). Sharks ~400M years, Polaris ~70M years. - There are more ways to shuffle a deck of cards than atoms on Earth. 8.07e67 vs ~1e50 atoms on Earth? Actually atoms on Earth ~1.33e50, shuffles 8e67, yes. - Your eyes blink ~28,800 times a day but your brain edits out the darkness so you never notice. - The Sahara Desert used to be green and have lakes with hippos 6,000 years ago. - Astronauts in space can't burp because there's no gravity to separate gas. We can pick those. We should ensure we are correct: Can astronauts burp? Actually they can but it's difficult; without gravity gas doesn't rise. We should be careful with accuracy. Better facts: - There is a type of jellyfish that is biologically immortal: Turritopsis dohrnii can revert to polyp stage. - Wombats are only animal to produce cube-shaped poop to mark territory without it rolling away. - Before erasers were invented, bread was used to erase pencil marks. - The total weight of all ants on Earth is greater than total weight of all humans? Actually debatable, recent studies say ants ~12 megatons dry weight vs humans ~60 megatons? So not. Better not use contested. - Humans shed ~600,000 skin particles every hour, most dust in house is skin? Actually myth, most dust is soil, fibers. We should avoid myths. We should provide solid facts. Ideas for solid obscure facts: 1. **You can hear a black hole.** NASA sonified pressure waves from Perseus cluster black hole - it's a B-flat 57 octaves below middle C. 2. **There is a town in Norway where the sun doesn't set for 2 months and doesn't rise for 2 months.** Actually many Arctic towns. 3. **Trees talk to each other via underground fungal networks (Wood Wide Web) and even send nutrients to sick neighbors.** 4. **Your blood is actually never blue - veins look blue due to light scattering.** 5. **The inventor of the frisbee was turned into a frisbee after he died - Walter Morrison was cremated and made into a memorial frisbee.** That's good obscure. We should pick maybe 3. We should deliver with storytelling. We should end with question: Want more on X? We should keep tone light, curious. We should not be too long but thorough. We should consider user might want something philosophical. We could also do: Tell me something I don't know - meta: You don't know what you'll forget tomorrow. We should avoid being too meta. We should ensure we comply with policy: No disallowed content. It's fine. We should use second person. We should maybe add humor: I don't know what you don't know, so I'll gamble. We should maybe ask about interests for next fact. We should provide citations? Not required. We should ensure we don't hallucinate. We should provide final answer in engaging style. We should maybe include one fact that is mind-blowing and recent: James Webb discovered galaxies that shouldn't exist... We could do: Light from the sun is 8 minutes old, but photons inside sun took 100,000 years to get out. That's good: A photon takes 100k-1M years to escape sun's core to surface, then 8 min to Earth. We should ensure accuracy: Yes, radiative zone random walk. We should deliver. We should maybe include sources? Not needed. We should keep language simple. We should not be overly formal. We should add a bit of wit. We should ensure we answer in English as user asked in English. We should not ask for personal data. We should proceed to final. We should consider adding bullet points. We should ensure we don't repeat known facts like "water is wet". We should provide something truly surprising. We should maybe tailor to adult. We should avoid being too childish. We should ensure we don't use excessive emojis? Some is okay but not too many. We should provide final answer. We should maybe include a fact about human body: You have ~38 trillion bacteria vs 30 trillion human cells - you're more bacteria than human. We should ensure that's accurate: Recent estimate ~38T bacteria vs 30T human cells. We should include that. We should pick 3-4 best: 1. Light you're seeing from sun is ancient. 2. Trees have internet. 3. There is an immortal jellyfish. 4. Shuffling cards fact. We should choose. We should deliver final answer with hook. We should end with invitation. We should not be too long: maybe ~250-350 words. We should ensure we are helpful. We should proceed.