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Wikipedia
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A free, collaborative, multilingual internet encyclopedia.

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Do you have someone who is not quite a friend, not quite an enemy? Tag them. (Just kidding.) 

The word "frenemy" combines the two roles to describe someone with whom one remains cordial despite underlying tension or rivalry.

Shake hands with more knowledge ➡️ w.wiki/_zL2d
Two people in elaborate Glinda and Wicked Witch of the West costumes, holding a wand and broom. Text says: There's a word for someone who blends the roles of friend and rival, maintaining civility while harboring distrust. The term frenemy dates back to the 19th century and reflects the complex motives that underlie some social relationships.
November 20, 2025 at 2:13 PM
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No conclusive evidence of their fate has been found. Some historians think the settlers integrated with local tribes; others suggest they succumbed to disease, starvation, or conflict.

Explore the mystery ➡️ w.wiki/3jrp (3/3)
Illustration of a man dressed in colonial clothing looking at a tree that has "Croatoan" carved into it. Text says: Archaeologists and historians still search for traces of the settlers, debating whether they joined nearby Indigenous communities or met a different fate entirely.
November 19, 2025 at 12:21 PM
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When he arrived in 1590, the settlement was deserted. Buildings were dismantled and the word “CROATOAN” was carved on a post. White believed the colonists had moved to Croatoan Island to live with a friendly Indigenous group, but storms prevented him from searching. (2/3)
Simple map marking Roanoke Island as the Lost Colony and Jamestown Colony, highlighting their positions in Virginia and North Carolina. Text says: Subsequent English efforts shifted north to establish Jamestown in 1607, leaving Roanoke’s story unresolved.
November 19, 2025 at 12:21 PM
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CROATOAN 🌲

This English attempt to settle in North America ended with a mystery. 

In 1587, settlers established a colony on Roanoke Island, now part of North Carolina. Governor John White returned to England for supplies and did not make it back for three years due to war. 🧵⬇️ (1/3)
Group of men in 16th-century attire examine the word "CROATOAN" carved on a tree, referencing the Lost Colony of Roanoke. Text says: In 1587, over 100 English settlers vanished from Roanoke Island off North Carolina. When their governor returned three years later, the colony was deserted. Its only trace was the word "CROATOAN" carved into a post.
November 19, 2025 at 12:21 PM
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In South Asian folklore, bhootas are restless spirits believed to linger after death.

People protect themselves by hanging charms, placing iron objects by doorways, or burning turmeric. Stories warn against walking alone and blend fear and humor.

Get more bhoota facts ➡️ w.wiki/FLhg
Three intricately carved wooden and metal statues of Hindu deities displayed against a burlap-textured backdrop. Text says: Described as shape‑shifters with backward‑facing feet and no shadows, bhootas are spirits in South Asian folklore that haunt places until rituals help them reincarnate.
November 18, 2025 at 12:59 PM
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Still free, neutral, open, and human. #Wikipedia25

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November 17, 2025 at 6:11 PM
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The paradox highlights how infinity and abstraction can defy common sense, making it a famous thought experiment that intrigues mathematicians and curious minds.

Break open some knowledge ➡️ w.wiki/8qGH (3/3)
Illustration of the Banach–Tarski paradox showing a sphere split and reassembled into two identical spheres. Text says: The Banach–Tarski paradox only works in three or more dimensions and relies on the axiom of choice. The "pieces" used in the construction are so highly nonmeasurable that they cannot exist as physical objects.
November 16, 2025 at 8:39 PM
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This counterintuitive result relies on the axiom of choice and challenges intuitive ideas of volume.

The pieces are nonmeasurable sets that lack volume in the usual sense; physically, such decompositions cannot exist because atoms can’t be split arbitrarily. (2/3)
Colored point clusters illustrating sets and their transformations in a Cayley graph diagram. Text says: This diagram shows how a group can be broken into different parts and then reassembled in surprising ways. The colored dots mark sets that overlap and shift when you move around the graph with the steps a and b. These kinds of decompositions are the building blocks behind the Banach–Tarski paradox.
November 16, 2025 at 8:39 PM
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The Banach–Tarski paradox is a theorem in set‑theoretic geometry.

It shows a solid ball can be divided into a finite number of pieces and reassembled into two identical balls without stretching or adding material. 🧵⬇️ (1/3)
November 16, 2025 at 8:39 PM
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Few facial features have shifted fashion as much as the moustache.

From French, Italian, and Greek roots, this strip of hair above the lip has stood for style, maturity, and authority across cultures.

More ➡️ w.wiki/C5jq
Twelve stylized black mustache designs, each with unique curls, shapes, and textures, displayed in a 3x4 grid. Text says: Trends change. The moustache adapts. What makes it timeless?
November 15, 2025 at 11:10 AM
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This fishing method has stuck around due to strong community efforts and cultural preservation initiatives. Only a handful of families still practice it, and they’ve turned it into both a living tradition and a tourist spectacle.

Learn more ➡️ w.wiki/G5mJ
Article of the Week: Shrimp fishing on horse back in Oostduinkerke. Dating back several centuries, this Belgian practice is unique in the world. Image depicts a traditional shrimp fisherman on horseback; the man is wearing waterproof gear and riding a powerful draft horse into shallow coastal waters, pulling a large funnel-shaped net suspended by two wooden planks to catch shrimp.
November 14, 2025 at 3:18 PM
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The future of knowledge is yours to protect. #Wikipedia25

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November 10, 2025 at 3:10 PM
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Devices like TinyLev let educators explore acoustic levitation. Generating the necessary sound intensity requires care, but the technique illustrates how sound waves exert force and is being explored for manufacturing and pharmaceuticals. Float your way to more knowledge ➡️ w.wiki/FLhd (4/4)
Bright red “STOP” sign projected mid-air using a focused ultrasonic transducer array. Text says: Acoustic levitation has also been proposed as a technique for creating a volumetric display, with light projected onto a particle, which moves along the path to create the image faster than the eye can process.
November 9, 2025 at 4:03 PM
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Arrays of transducers can move levitated objects in three dimensions or merge droplets. Demonstrations show styrofoam beads or water droplets floating between a speaker and a reflector. (3/4)
Blue sphere levitated above a hemispherical array of ultrasonic transducers in a lab setting. Text says: This single-beam acoustic levitator is using a vortex trap to levitate an expanded polystyrene particle approximately twice the size of the wavelength. The vortices are alternated rapidly in direction to avoid spinning the particle to the point of instability.
November 9, 2025 at 4:03 PM
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A transducer emits ultrasonic waves toward a reflector, creating nodes where upward pressure balances gravity. This containerless environment is useful for studying materials that would otherwise stick to a container, such as molten metals or protein crystals. (2/4)
Homemade ultrasonic levitation device with Arduino and transducer arrays suspending beads midair. Text says: Speakers above and below send out sound waves that meet in the middle. The waves form invisible pressure spots that can hold tiny objects floating in midair.
November 9, 2025 at 4:03 PM
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Sound can do more than carry music; high‑intensity sound waves can lift small objects. Acoustic levitation uses standing sound waves to suspend solids, liquids, or droplets in midair. 🧵⬇️ (1/4)
November 9, 2025 at 4:03 PM
wikipedia.org
City transit is not just for humans.

These animals are not commuting for work; they are seeking comfort, food, and safety. Their behavior highlights how urban wildlife adapts to human environments. It also challenges our ideas about public space. 

Hitch a ride to more info ➡️ w.wiki/FP3C
Dog wearing a diaper lying on a patterned bus seat next to a person’s arm. Text says: They need to get around too, apparently. These animals take advantage of human infrastructure. A pigeon stands on the floor of a subway car as passengers sit around it. Text says: Pigeons in New York City are known to take subway cars. Dog wearing a collar labeled "Boji" sniffs the floor of a crowded ferry. Text says: Boji is a street dog in Istanbul, Turkey, known for regularly riding on the city's public transport. Tan dog resting on the floor between passengers in a subway car. Text says: In Moscow, free-roaming dogs are known to ride the metro.
November 8, 2025 at 1:50 PM
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Ever seen a car smile at you? That's apophenia.

From faces on Mars to Jesus on toast, these curiosities likely stem from mistaken identification and our brains’ overinterpretation of what our eyes see.

Learn more about our brains' desire to make connections and identify patterns ➡️ w.wiki/4wUF
Article of the Week: Apophenia. If your eyes tell you that this is a face, you are experiencing apophenia. It is your brain’s way of connecting dots and detecting patterns between two unrelated items. Image depicts the “Face on Mars”, one of the most striking and remarkable images taken during the Viking missions to the red planet.
November 7, 2025 at 1:21 PM
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On Gurpurab, gurdwaras host hymns, scripture readings, and kirtan. After prayers, worshippers share a meal. Night prayers coincide with Guru Nanak’s birth. The festival emphasizes service, equality, and reflection. Discover this unifying celebration ➡️ w.wiki/9a7o (2/2)
Traditional painting of Guru Nanak seated with a calm expression, surrounded by ornate framing. Text says: Guru Nanak, a 15th to 16th century religious leader in the Punjab region, is known as the founder of Sikhism. He is recognized for teaching devotion to God, the equality of all people, and the importance of honest living and service.
November 5, 2025 at 6:20 PM
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Guru Nanak Gurpurab celebrates the founder of Sikhism’s birth. Festivities begin with predawn Prabhat Pheris of devotional singing. A 48‑hour reading of the "Guru Granth Sahib" and, the day before, a grand street procession with the Sikh flag and scriptures lead into the main day. 🧵⬇️ (1/2)
A brightly lit Sikh temple adorned with white and purple lights against a dark sky. Text says: This Sikh festival is marked by processions, scripture readings, hymn singing, and langar, a communal meal that welcomes all.
November 5, 2025 at 6:20 PM
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This Korean art means gathering place + sound.

Pansori performances can last for hours and draw on tales like "Chunhyangga" and "Sugungga". Born as folk entertainment, pansori is now a recognized cultural treasure.

Drum up more knowledge ➡️ w.wiki/FLhX
A Korean pansori performance with a singer in white hanbok and a seated drummer on a dark, minimalist stage. Text says: Pansori is a Korean art of storytelling in which a singer and a drummer perform epics that can last for hours.
November 4, 2025 at 2:42 PM
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The idea caught on as people sought portable meals. Bread‑and‑filling dishes existed worldwide for centuries, but the name stuck. Countless combinations fit the definition today.

Bite into more sandwich knowledge ➡️ w.wiki/AjpJ (2/2)
Text says: The modern sandwich is definitely named after Lord Sandwich, but the details are debated. A rumor in a travel book formed the popular myth that bread and meat sustained Lord Sandwich during long stretches at the gambling table. The sober alternative to this account is provided by Sandwich's biographer N. A. M. Rodger, who suggests that Sandwich's commitments to the navy, to politics, and to the arts mean that the first sandwich was more likely to have been consumed at his work desk.
November 3, 2025 at 2:01 PM
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Celebrate World Sandwich Day by exploring the origin of this convenient meal 🥪

Legend says the Fourth Earl of Sandwich asked for meat between slices of bread so he could continue playing cards or working without greasy hands. 🧵⬇️ (1/2)
A man in 18th-century attire stands beside a column, holding a scroll, with domed buildings behind him. Text says: Does the modern sandwich exist because of one man's love for gambling? Probably not. But this popular myth helped make John Montagu, 4th Earl of Sandwich and namesake of the sandwich, a legendary figure.
November 3, 2025 at 2:01 PM
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Across the International Space Station's modules, hundreds of experiments explore how life, materials, and even stars behave in microgravity.

Orbit more cosmic knowledge ➡️ w.wiki/tTY
Aurora borealis glows green over Earth's horizon, seen from space with city lights below and the Moon shining above. Text says: Life above Earth. On 2 November 2000, the first crew arrived at the International Space Station, beginning 25 years of human presence in orbit.
November 2, 2025 at 9:35 PM
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By blending Indigenous beliefs with Catholic tradition, the ofrenda shows that death is part of life and memory keeps relationships alive.

Find your way to more knowledge about this tradition ➡️ w.wiki/5sjb (4/4)
A vibrant Day of the Dead altar filled with photos, marigolds, candles, and papel picado. Text says: From small family altars to large group celebrations, the Day of the Dead is both deeply personal and communal.
November 1, 2025 at 11:13 AM