facts for kids

Kiddle News 

Tilcayo in captivity at La Senda Verde.

• First new wild cat species in over a century is discovered in Bolivia: meet the Tilcayo, a wild cat of the cloud forests.
• Scientists find first-ever footprints of a grown T.rex in North Dakota.
• OpenAI Unveils GPT-6 Astra, the closest AI yet to thinking like a human.
• Hubble Telescope spots a giant 10-sided wave swirling around Saturn's south pole.
• NASA’s Nancy Grace Roman Space Telescope launches toward Sun–Earth L2 orbit.
• A humanoid robot runs 100 meters in 9.39 seconds, beating Usain Bolt's record of 9.58 seconds.
• Astronomers have discovered the first black hole star— a Solar System-sized object in Cetus that outshines its entire host galaxy.
• The Long March 10B marked the first successful net-based rocket recovery ever achieved.

Mind-blowing Facts 

The Pillars of Creation in the Eagle Nebula, one of the most famous space photographs in history taken by the Hubble Space Telescope.

When the Hubble Space Telescope first opened its robotic eyes in 1990, scientists were shocked to see that every picture came out blurry.

What had gone wrong? Hubble's giant main mirror had been polished into the wrong shape by a mistake smaller than 1/50th the thickness of a human hair! That tiny error was too small to see, but it was big enough to keep light from focusing correctly.

Thankfully, astronomers and engineers did not give up. In December 1993, a brave crew of astronauts flew into space aboard the Space Shuttle Endeavour on a daring repair mission. During five intense spacewalks, they installed a special tool called COSTAR, which stands for Corrective Optics Space Telescope Axial Replacement. COSTAR worked like a pair of high-tech eyeglasses for Hubble, fixing its blurry vision. When Hubble looked back at the stars, everything was perfectly clear!

Daily Trivia 

Watercolor portrait of Ada King, Countess of Lovelace, a brilliant English mathematician and writer.

• Who is the most portrayed literary character ever, according to the Guinness Book of World Records?
• A 'yotta' is a super big number used in the metric system. How big is it exactly?
• What is the Robin Hood tax?
• Which part of the brain helps create your dreams?
• Which plant that grows its yummy seeds underground is considered a "good luck charm" for NASA?
• Imagine you have two identical clocks synchronized to tick at the exact same rate. If you leave one clock on Earth and put the other inside a super-fast spaceship, the two clocks will no longer match when the spaceship returns. Why?
• Who is regarded as the first computer programmer?
• What is the only bird with nostrils at the end of its beak?

Below is a list of some articles and categories to help you research different topics for school homework help, homeschooling and general education.

History

Prehistory and ancient world

Prehistory • Stone Age • Bronze Age • Iron Age • Mesopotamia • Ancient Egypt • Ancient Greece • Roman Empire • Han Dynasty • Gupta Empire

Middle Ages and Early Modern

Abbasid Caliphate • Age of Enlightenment • Aztec • Byzantine Empire • Crusades • Holy Roman Empire • Hundred Years' War • Middle Ages • Mongol Empire • Ming Dynasty • Ottoman Empire • Protestant Reformation • Thirty Years' War • Renaissance • Tang Dynasty • Vikings

Modern

Arab-Israeli conflict • American Civil War • Apartheid • British Empire • Cold War • Cultural Revolution • French Revolution • Great Depression • The Holocaust • Industrial Revolution • Nazi Germany • Meiji Restoration • Russian Revolution • Qing Dynasty • Treaty of Versailles • Vietnam War • World War I • World War II

Biography

Actors

Sarah Bernhardt • Charlie Chaplin • Leonardo DiCaprio • Tom Hanks • Meryl Streep • Ingrid Bergman • Henry Fonda

Artists

Salvador Dalí • Albrecht Dürer • Vincent van Gogh • Francisco de Goya • Frida Kahlo • Leonardo da Vinci • Henri Matisse • Michelangelo • Pablo Picasso • Raphael • Rembrandt • Peter Paul Rubens • Andy Warhol

Authors, playwrights and poets

Roald Dahl • Enid Blyton • C. S. Lewis • Hans Christian Andersen • Geoffrey Chaucer • Charles Dickens • William Shakespeare • Sophocles • Mark Twain

Composers and musicians

Louis Armstrong • Johann Sebastian Bach • The Beatles • Ludwig van Beethoven • Johannes Brahms • Frédéric Chopin • Antonín Dvořák • George Frideric Handel • Wolfgang Amadeus Mozart • Édith Piaf • Elvis Presley • Giacomo Puccini • Franz Schubert • Igor Stravinsky • Pyotr Ilyich Tchaikovsky • Giuseppe Verdi • Antonio Vivaldi • Richard Wagner • ABBA • Céline Dion • Michael Jackson • Dolly Parton • Ray Charles • John Williams • Louis Armstrong • Glenn Miller • John Lennon • Paul McCartney • Simon & Garfunkel • Eric Clapton • Keith Urban

Explorers and travelers

Roald Amundsen • Neil Armstrong • Jacques Cartier • Christopher Columbus • James Cook • Hernán Cortés • Yuri Gagarin • Vasco da Gama • Ibn Battuta • Ferdinand Magellan • Marco Polo

Film directors and screenwriters

Walt Disney • Alfred Hitchcock • Steven Spielberg • James Cameron • Peter Jackson • Russo brothers • Michael Bay • Christopher Nolan • Tim Burton • George Lucas • Clint Eastwood • David Yates • Ridley Scott • J. J. Abrams

Inventors, scientists and mathematicians

Archimedes • Avicenna • Tim Berners-Lee • Nicolaus Copernicus • Marie Curie • Charles Darwin • Thomas Edison • Albert Einstein • Euclid • Leonhard Euler • Michael Faraday • Enrico Fermi • Fibonacci • Henry Ford • Joseph Fourier • Galen • Galileo Galilei • Carl Friedrich Gauss • Johannes Gutenberg • James Prescott Joule • Johannes Kepler • Al-Khwarizmi • Gottfried Leibniz • Carl Linnaeus • James Clerk Maxwell • Dmitri Mendeleev • Isaac Newton • Louis Pasteur • Max Planck • Ernest Rutherford • Erwin Schrödinger • Nikola Tesla • Alan Turing • James Watt

Philosophers and social scientists

Aristotle • Noam Chomsky • Confucius • Sigmund Freud • John Maynard Keynes • Karl Marx • Plato • Jean-Jacques Rousseau • Jean-Paul Sartre • Socrates • Voltaire

Political leaders

Akbar the Great • Alexander the Great • Ashoka the Great • Mustafa Kemal Atatürk • Augustus • Otto von Bismarck • Simón Bolívar • Napoleon • Julius Caesar • Charlemagne • Winston Churchill • Constantine the Great • Cyrus the Great • Charles de Gaulle • Elizabeth I • Mahatma Gandhi • Genghis Khan • Che Guevara • Adolf Hitler • Joan of Arc • Martin Luther King Jr. • Vladimir Lenin • Abraham Lincoln • Louis XIV of France • Rosa Luxemburg • Nelson Mandela • Mao Zedong • Jawaharlal Nehru • Kwame Nkrumah • Peter the Great • Qin Shi Huang • Franklin D. Roosevelt • Saladin • Joseph Stalin • Suleiman the Magnificent • Sun Yat-sen • Tamerlane • Umar • George Washington

Religious figures and theologians

Abraham • Thomas Aquinas • Augustine of Hippo • Gautama Buddha • Al-Ghazali • Jesus • Martin Luther • Moses • Muhammad • Paul the Apostle

Arts and recreation

Culture • Art • Comics • Painting • Photography • Sculpture

Architecture and civil engineering

Architecture • Arch • Bridge • Canal • Dam • Dome • House • Burj Khalifa • Colosseum • Great Wall of China • Eiffel Tower • Empire State Building • Hagia Sophia • Parthenon • Giza pyramid complex • St. Peter's Basilica • Statue of Liberty • Taj Mahal • Three Gorges Dam • Pyramid • Tower

Film, radio and television

Film • Animation • Anime • Radio • Television

Music

Music • Song • Blues • Classical music • Opera • Symphony • Electronic music • Flamenco • Hip hop • Jazz • Reggae • Rock music • Samba • Accordion • Brass instrument • Alto saxophone • Bass guitar • Bass drum • Bassoon • Bongo • Carillon • Cello • Tubular bells • Clarinet • Contrabassoon • Cornet • Drum • Electric guitar • Electric piano • Synthesizer • Cor anglais • Euphonium • Flugelhorn • Flute • Horn (instrument) • Guitar • Harmonica • Harp • Harpsichord • Lyre • Oboe • Piano • Piccolo • Pipe organ • Recorder • Saxophone • Snare drum • Double bass • String instrument • Timpani • Trombone • Trumpet • Tuba • Vibraphone • Viola • Violin • Xylophone • Zither • Mandolin • Lute • Wind instrument • Woodwind instrument • Bagpipes • Percussion instrument • Cymbal

Recreation

Game • Backgammon • Chess • Go • Croquet • Horseshoes • Knucklebones • Paper football • Pinball • Snooker • Table football • Snakes and ladders • Backgammon • Dominoes • Scrabble • Tic-tac-toe • Sudoku • Charades

Martial arts

Aikido • Borneo • Bujutsu • Iaido • Jujutsu • Jodo • Kempo • Kendo • Kyudo • Karate • Judo • Shorinji kenpo • Shotokan • Sumo • Taijutsu • Hapkido • Taekyun • Taekwondo • Tangsudo • Kali • Eskrima • Thai boxing • Kung-fu • Wushu • Taiji quan • Budokan

Olympic Games

Sport • Track and field • Auto racing • Basketball • Cricket • Association football • Golf • Rugby • Tennis • Rowing • Sailing • Surfing • Swimming • Skiing • Freestyle skiing • Ski jumping) • Figure skating • Diving • Shooting • Boxing • Fencing • Wrestling • Softball • Badminton • American football • Australian Football • Canadian football • Polo • Volleyball • Gymnastics • Acrobatics • Motor sports • Bobsled • Toy

Science

Science • History of science • Knowledge • Nature • Experiment

Astronomy

Astronomy • Asteroid • Big Bang • Black hole • Comet • Galaxy • Planet • Spaceflight • Star • Universe • Solar System • Moon • Earth • Jupiter • Mars • Mercury • Neptune • Saturn • Uranus • Venus • Sun

Geology

Geology • Geomorphology • Historical geology • Hydrogeology • Palaeontology • Petrology • Mineralogy • Sedimentology • Stratigraphy • Structural geology • Volcanology • Seismology • Engineering geology • Petroleum geology

Biology

Biology • Zoology • Ornithology • Mammalogy • Ichthyology • Herpetology • Microbiology • Biological materials • Biomolecule • Protein • Enzyme • Carbohydrates • Lipids • Nucleic acids • DNA • RNA • Botany • Agronomy • Biotechnology • Sustainable agriculture • Organic farms • Bryology • Forestry • Horticulture • Micropaleontology • Plant anatomy • Plant morphology • Phycology • Mycology • Ecology • Environmentalism • Biodiversity • Ecosystem • Habitat • Ecological niche • Keystone species • Sustainable development • Biome • Biosphere • Food chain • Endangered species • Domestication • Cattle • Horse • Sheep • Chicken • Pig • Domestic goat • Goose • Duck • Turkey (bird) • Pet • Goldfish • Hamster • Guinea pig • Cat • Dog • Parrot • Life • Birth • Evolution • Reproduction • Death • Biological classification • Taxonomy • Binomial nomenclature • Domain • Kingdom • Phylum • Class • Order • Family • Genus • Species

Biological processes

Metabolism • Digestion • Photosynthesis • Breathing • Evolution • Catabolism • Anabolism

Organisms

Organism• Archaea • Bacteria • Eukaryote • Animals • Arthropods • Insects • Ants • Bees • Mosquitoes • Beetle • Fly • Butterfly • Wasp • Hemiptera] • Grasshopper • Dragonfly • Damselfly • Stick insect • Spiders • Black widow • Wolf spider • Goliath birdeater • Jumping spider • Tarantula • Sydney funnel-web spider • Crab • Shrimp • Millipede • Centipede• Amphibian • Frogs • Toads • Salamanders • Caecilians • Birds • Chicken • Pigeons and doves • Falcon • Starling • Crow • Owl • Tit • Finch • Heron • Cuckoo • Hawk • Eagle • Lark • Robin • Swift • Woodpecker • Sparrow • Jay • Condor • Gull • Stork • Fish • Ray • Shark • Tuna • Swordfish • Salmon • Cod • Mammal • Camel • Rodent • Rat • Mouse • Porcupine • Chipmunk • Squirrel • Beaver • Vole • Prairie dog • Chinchilla • Capybara • Primate • Strepsirrhini • Lemur • Galago • Lorisids • Haplorhini • Tarsiers • Monkeys • Baboons • Macaques • Capuchin monkeys • Tamarins • Apes • Gibbon • Siamang • Chimpanzee • Gorilla • Orangutan • Human • Homo habilis • Homo erectus • Homo habilis • Human evolution • Cetacea • Whales • Dolphins • Porpoises • Reptile • Dinosaur • Snake • Crocodile • Lizard • Turtle • Fungus • Algae • Plants • Flower • Tree • Herbs • Shrubs • Grasses • Vines • Ferns • Mosses • Green algae

Anatomy

Anatomy • Cell • Circulatory system • Blood • Heart • Blood vessels • Arteries • Veins • Capillary • Endocrine system • Hypothalamus • Pineal gland • Pituitary gland • Thyroid • Adrenal gland • Parathyroid glands • Human gastrointestinal tract • Salivary gland • Esophagus • Pharynx • Stomach • Intestine • Large intestine • Colon • Cecum • Rectum • Small intestine • Duodenum • Jejunum • Ileum • Liver • Gallbladder • Pancreas • Tongue • Muscle • Nervous system • Central nervous system • Peripheral nervous system • Autonomic nervous system • Sympathetic nervous system • Parasympathetic nervous system • Somatic nervous system • Brain • Sensory system • Ear • Nose • Eye • Respiratory system • Lung • Diaphragm • Trachea • Bronchus • Bronchioles • Alveolus • Skeleton • Skin

Health and medicine

Medicine • Common cold • Dentistry • Disability • Blindness • Deafness • Disease • Health • Headache • Immune system • Antibiotics • Penicillin • Virus • Influenza

Chemistry

Chemistry • Inorganic chemistry • Biochemistry • Chemical compound • Acid • Base (chemistry) • Salt • Chemical element • Periodic table • Aluminium • Carbon • Copper • Gold • Hydrogen • Iron • Nitrogen • Oxygen • Silver • Tin • Organic chemistry • Alcohol • Carbohydrate • Hormone • Lipid • Molecule • Analytical chemistry • Physical chemistry

Earth science

Avalanche • Climate • El Niño-Southern Oscillation • Global warming • Earthquake • Geology • Mineral • Plate tectonics • Rock • Natural disaster • Flood • Tsunami • Volcano • Weather • Cloud • Rain • Snow • Tornado • Tropical cyclone • Wind

Physics

Physics • Acceleration • Atom • Energy • Conservation of energy • Electromagnetic radiation • Infrared • Ultraviolet • Light • Color • Classical mechanics • Force • Electromagnetism • Magnetic field • Gravitation • Strong interaction • Weak interaction • Magnet • Mass • Metal • Steel • Nuclear fission • State of matter • Gas • Liquid • Plasma • Solid • Quantum mechanics • Radioactive decay • General relativity • Special relativity • Semiconductor • Sound • Velocity • Speed of light • Temperature • Time • Thermodynamics • Vacuum

Measurement and units

Measurement • Kilogram • Litre • Metre • International System of Units • Second

Timekeeping

Calendar • Gregorian calendar • Julian calendar • Islamic calendar • Hebrew calendar • Clock • Day • Time zone • Year

Foodstuffs

Food • Bread • Cereal • Barley • Maize • Oat • Rice • Rye • Sorghum • Wheat • Cheese • Chocolate • Honey • Fruit • Apple • Banana • Grape • Soybean • Lemon • Nut (fruit) • Meat • Sugar • Vegetable • Potato

Beverages

Beer • Coffee • Juice • Milk • Tea • Water • Wine

Mathematics

Mathematics • Algebra • Logarithm • System of linear equations • Arithmetic • Addition • Division (mathematics) • Fractions • Multiplication • Percentage • Subtraction • Coordinate system • Equation • Function (mathematics) • Geometry • Angle • Area • Pi • Pythagorean theorem • Mathematical proof • Number • Complex number • Number theory • Infinity • Set theory • Statistics • Symmetry • Trigonometry

Technology

Technology • Biotechnology • Clothing • Cotton • Engineering • Machine • Robot • Screw • Wheel • Agriculture • Irrigation • Plough • Metallurgy • Nanotechnology

Communication

Communication • Book • Information • Encyclopedia • Journalism • Newspaper • Mass media • Printing • Telephone

Electronics

Electronics • Electric current • Frequency • Capacitor • Inductor • Transistor • Diode • Resistor • Transformer

Computers and Internet

Computer • Hard disk drive • Central processing unit • Artificial intelligence • Information technology • Algorithm • Internet • Email • World Wide Web • Operating system • Programming language • Software

Energy and fuels

Renewable energy • Electricity • Nuclear power • Fossil fuel • Internal combustion engine • Steam engine • Fire

Materials

Glass • Paper • Plastic • Wood

Transportation

Transport • Aircraft • Automobile • Bicycle • Submarine • Ship • Train

Philosophy and psychology

Philosophy

Philosophy • Beauty • Dialectic • Ethics • Epistemology • Feminism • Free will • Knowledge • Consciousness • Logic • Mind • Probability • Reality • Truth

Psychology

Psychology • Behavior • Emotion • Love • Thought

Religion

World view and religion

God • Mythology • Atheism • Fundamentalism • Materialism • Monotheism • Polytheism • Soul • Religion • Buddhism • Christianity • Catholic Church • Confucianism • Hinduism • Trimurti • Islam • Shia Islam • Jainism • Judaism • Sikhism • Taoism • Zoroastrianism • Sufism • Yoga • Zen

Social sciences

Society • Child • Man • Marriage • Woman • Civilization • Anthropology • Archaeology

Geography

Geography • City • Continent • Mountain • Desert • North Pole • Ocean • Rainforest • River • Sea • South Pole

Continents and major regions

Africa • Antarctica • Asia • Europe • Middle East • North America • Oceania • South America

Countries

Afghanistan • Algeria • Argentina • Australia • Austria • Bangladesh • Brazil • Canada • China • Democratic Republic of the Congo • Cuba • Egypt • Ethiopia • France • Germany • India • Indonesia • Iran • Iraq • Israel • Italy • Japan • Mexico • Netherlands • New Zealand • Nigeria • Pakistan • Poland • Portugal • Russia • Saudi Arabia • Singapore • South Africa • South Korea • Spain • Sudan • Switzerland • Tanzania • Thailand • Turkey • Ukraine • United Kingdom • United States • Vatican City • Venezuela • Vietnam

Cities

Amsterdam • Athens • Baghdad • Bangkok • Beijing • Berlin • Bogotá • Brussels • Buenos Aires • Cairo • Cape Town • Damascus • Delhi • Dhaka • Dubai • Hong Kong • Istanbul • Jakarta • Jerusalem • Karachi • Kinshasa • Kolkata • Lagos • London • Los Angeles • Madrid • Mecca • Mexico City • Moscow • Mumbai • Nairobi • New York City • Paris • Rio de Janeiro • Rome • Saint Petersburg • São Paulo • Seoul • Shanghai • Sydney • Tehran • Tokyo • Vienna • Washington, D.C.

Bodies of water

Amazon River • Arctic Ocean • Atlantic Ocean • Baltic Sea • Black Sea • Caribbean Sea • Caspian Sea • Congo River • Danube • Ganges • Great Barrier Reef • Great Lakes • Indian Ocean • Indus River • Lake Baikal • Lake Tanganyika • Lake Victoria • Mediterranean Sea • Mississippi River • Niger River • Nile • North Sea • Pacific Ocean • Panama Canal • Rhine • Suez Canal • Southern Ocean • Volga River • Yangtze River • Yellow River

Mountains and mountain ranges

Alps • Andes • Appalachian Mountains • Himalayas • Caucasus Mountains • American cordillera • Ural Mountains • Sierra Nevada • Rocky Mountains • Pyrenees • Mount Kilimanjaro • Denali • Mount Everest

Deserts

Desert • Sahara • Kalahari Desert • Patagonian Desert • Syrian Desert • Great Basin Desert • Gobi Desert • Arabian Desert

Political Science

Politics • Anarchism • Colonialism • Communism • Conservatism • Democracy • Dictatorship • Diplomacy • Fascism • Globalization • Government • Ideology • Imperialism • Liberalism • Marxism • Monarchy • Nationalism • Republic • Socialism

Business and economics

Economics • Microeconomics • Price • Supply and demand • Market • Macroeconomics • Gross domestic product • Tax • Unemployment • Inflation • Exchange rate • Interest • Economic growth • Production • Industry • Capital • Capitalism • Land • Business • Money • Currency • Euro • Yen • United States dollar • Peso • Pound • Ruble • Bolívar • Krone • Dinar • Yuan

Law

Law • Criminal law • Constitutional law • International law • Customary law • Tort law • Civil law • English law • Constitution • Rights • Jurisprudence • Rule of law

War and military

Military • Navy • Air force • Marines • Army • Infantry • Cavalry • Artillery • Military engineering • Peace • War • Cold War • Civil war • American Civil War • Spanish Civil War • English Civil War • Russian Civil War

Language and literature

Language • Constructed language • Dialect • Dictionary • Grammar • Adjective • Adverb • Conjunction • Grammatical case • Noun • Pronoun • Sentence • Syntax • Verb • Linguistics • Word • Phoneme • Syllable • Alphabet • Literacy • Writing • Literature • Prose • Fiction • Novel • Poetry

See also

In Spanish: Enciclopedia Kiddle para niños