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# ABOUT SCIENCE

Learn Science Easy

## Sitemaps

- [XML Sitemap](https://about-science.org/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [How to extract DNA at home?](https://about-science.org/how-to-extract-dna-at-home/) - Extracting DNA in the kitchen: a hands-on experiment where students break open fruit cells with a homemade buffer, then use cold alcohol to pull visible DNA strands out of solution.
- [Are we living in a simulation?](https://about-science.org/are-we-living-in-a-simulation/) - The simulation hypothesis suggests our universe could be an advanced digital construct, where quantum behavior, information theory, and fine-tuning hint at computational origins.​
- [Why the Moon Turns Red: A Guide to the Physics and History of Lunar Eclipses](https://about-science.org/lunar-eclipse-what-do-you-need-to-know/) - A lunar eclipse occurs when Earth blocks sunlight from reaching the Moon, casting a shadow. It can be total, partial, or penumbral, depending on alignment.
- [Niels Bohr](https://about-science.org/niels-bohr/) - Niels Bohr was a revolutionary physicist who transformed our understanding of atoms and quantum reality, founding the Copenhagen interpretation.​
- [Is Consciousness Produced by the Brain? Why Science is Starting to Doubt the "Standard Model"](https://about-science.org/consciousness-beyond-the-brain/) - Recent studies explore consciousness possibly existing outside the brain, linking out-of-body experiences to sensory processing and non-local theories, though debated.
- [William Harvey](https://about-science.org/william-harvey/) - William Harvey revolutionized medicine by revealing how blood circulates through the body, replacing ancient beliefs with a new, evidence-based view of the heart.
- [Flat Earth and gravity: can it work?](https://about-science.org/flat-earth-and-gravity-can-it-work/) - Gravity pulls toward the center of mass, forming spheres; real-world evidence from physics, astronomy, and nature proves Earth cannot be flat.
- [Quantum biology explained: hidden quantum processes](https://about-science.org/what-is-quantum-biology/) - Quantum biology reveals how living organisms use quantum effects—like entanglement and tunneling—to navigate, sense and process energy.
- [Hippocrates](https://about-science.org/hippocrates/) - Ancient Greek physician who revolutionized medicine by replacing superstition with scientific approach. Founded medical ethics and the four temperaments theory.
- [What happens if you eat poisonous mushrooms?](https://about-science.org/what-happens-if-you-eat-poisonous-mushrooms/) - Poisonous mushrooms are deadly, often with delayed symptoms causing organ failure. Avoid wild mushrooms unless identified by experts.
- [Why webcaps are so dangerous?](https://about-science.org/why-webcaps-are-so-dangerous/) - Webcaps are deadly mushrooms containing toxins that cause irreversible kidney failure. Even tiny amounts can be fatal, making them extremely dangerous to eat.
- [What is the difference between viruses and bacteria?](https://about-science.org/bacteria-and-viruses-difference/) - Microscopic bacteria and viruses are ancient, invisible health threats—completely different entities with unique structures, sizes, and ways to cause disease.​
- [Theophrastus Paracelsus](https://about-science.org/theophrastus-paracelsus/) - Renaissance rebel Paracelsus mixed bold science with wild alchemy, defying tradition as he reshaped medicine, chemistry, and ideas about heredity.
- [Claudius Galen](https://about-science.org/claudius-galen/) - Claudius Galen, Rome’s legendary physician, revolutionized medicine and anatomy, shaping medical science for 1,500 years with discoveries that bridged eras.
- [Grigory Perelman](https://about-science.org/grigory-perelman/) - Grigory Perelman solved the century-old Poincaré conjecture in 2002, proving a topology holy grail via Ricci flow. He rejected the Fields Medal and $1M prize, vanishing into seclusion.
- [Solar vs Lunar Eclipse: what is the difference?](https://about-science.org/solar-vs-lunar-eclipse/) - Solar eclipses occur when the Moon blocks the Sun, while lunar eclipses happen when Earth's shadow covers the Moon. Both create stunning celestial events!
- [Water lake bacteria: can it be dangerous?](https://about-science.org/water-lake-bacteria/) - Beneath a lake’s calm surface thrives a diverse world of bacteria—vital for water quality, nutrient cycling, and ecosystem balance, but some can pose health risks.
- [What is Flagella? Amazing facts and functions](https://about-science.org/what-is-flagella/) - Flagella are whip-like structures that help cells move. Found in bacteria, protists, and sperm cells, they rotate or wave to propel the cell through liquids.
- [Biggest moon in the Solar System: which one?](https://about-science.org/biggest-moon-in-the-solar-system/) - The largest moon in the Solar System is Ganymede, a moon of Jupiter. It’s even bigger than Mercury and has a magnetic field, an icy crust, and a possible subsurface ocean.
- [Is the Earth flat?](https://about-science.org/is-the-earth-flat/) - The idea that Earth is flat is a debunked myth. Scientific evidence proves Earth is a sphere, confirmed by photos from space and global navigation systems.
- [How Do Plant Cells Divide?](https://about-science.org/how-do-plant-cells-divide/) - Plant cells divide through mitosis, where the nucleus splits, followed by cytokinesis, forming a new cell wall to separate the two daughter cells.
- [What is the Difference Between DNA and RNA?](https://about-science.org/difference-between-dna-and-rna/) - DNA has deoxyribose sugar, is double-stranded, and uses thymine. RNA has ribose sugar, is single-stranded, and uses uracil instead of thymine.
- [What is a Cell? Structure, function and diagrams](https://about-science.org/what-is-a-cell/) - Cells have a membrane, cytoplasm, and nucleus. They contain organelles like mitochondria and ribosomes, which help with energy production and protein synthesis.
- [What is Quasar?](https://about-science.org/what-is-quasar/) - A quasar is an extremely bright galactic core powered by a supermassive black hole, emitting massive energy as gas spirals inward, outshining entire galaxies.
- [Medieval Islamic Astronomy (8th – 15th Century)](https://about-science.org/medieval-islamic-astronomy/) - Medieval Islamic astronomy advanced celestial observations, refined Ptolemaic models, built observatories, and developed precise instruments like the astrolabe.
- [Nicolaus Copernicus. “Who stopped the Sun and moved the Earth”](https://about-science.org/nicolaus-copernicus/) - Nicolaus Copernicus was a Renaissance astronomer whose heliocentric model revolutionized science, placing the Sun—not Earth—at the center of our solar system.
- [Why is the sky blue?](https://about-science.org/why-is-the-sky-blue/) - The sky appears blue due to Rayleigh scattering, where sunlight interacts with air molecules, scattering shorter blue wavelengths more than longer reds.
- [The quantum measurement problem: why reality gets weird when nobody's looking](https://about-science.org/the-quantum-measurement-problem/) - Explore quantum mechanics' biggest mystery: why particles exist in multiple states until observed. From Schrödinger's cat to parallel universes explained.

## Pages

- [About Us](https://about-science.org/about-us/) - Making Science Experiential and Inspiring About-Science.org is a free educational platform dedicated to high-quality science education. We transform complex topics in biology, physics, astronomy and related fields into structured, interactive lessons that students (Grades 7–12), teachers and lifelong learners can truly experience and understand. Every lesson combines clear explanations with custom-built interactive tools — 3D
- [Editorial Process](https://about-science.org/editorial-process/) - At About Science, our mission is to deliver accurate, accessible, and trustworthy scientific information. Our content is crafted exclusively by our dedicated editorial team, who carefully study and rely on original research papers, scientific documents, and reputable academic sources. We do not accept external submissions without careful review and fact-checking; instead, we ensure every article
- [Interactive Maps and Tools to Learn Science](https://about-science.org/interactive-maps-and-tools-to-learn-science/) - MOON SIZE COMPARISON 3D SOLAR SYSTEM MAP LUNAR PHASE RIGHT NOW NIGHT SKY SIMULATOR Our interactive astronomy tools provide educational resources for exploring space phenomena through digital visualization. These maps allow users to examine celestial bodies, planetary relationships, and cosmic structures in an accessible format. The astronomy maps utilize accurate scientific data to represent the
- [Current Moon Phase: Tonight's Lunar Phase Calculator](https://about-science.org/current-moon-phase/) - The current moon phase shows how much of the Moon is illuminated from Earth's view. It changes daily, cycling through new moon, crescent, full moon, and more.
- [Contact us](https://about-science.org/contact-us/) - Have a question, suggestion, or want to collaborate with about-science.org? We’d love to hear from you. If you’re a fellow science enthusiast, a researcher, or simply curious about the latest discoveries, your input helps us make science more accessible and exciting for everyone. Why reach out? Share your thoughts on our latest articles or social
- [Sign-in or register with Google](https://about-science.org/sign-in-or-register-with-google/)
- [Privacy Policy](https://about-science.org/privacy-policy/) - Introduction About-Science.org ("we," "us," or "the Site") respects your privacy. This Policy explains data practices for https://about-science.org/. We collect minimal data to provide and improve the Site, an informational science education resource with no user accounts or forms. Information we collect Automatically collected: Usage data: IP address, browser type, pages viewed, time spent, via server
- [Cookie Policy](https://about-science.org/cookie-policy/) - Introduction This Cookie Policy explains how About-Science.org ("we," "us," or "the Site") uses cookies and similar technologies. We aim to be transparent about our practices to help you make informed choices. As an educational site focused on simplifying science, we use minimal cookies to enhance functionality and improve content. For details on data privacy, see
- [Terms of service](https://about-science.org/terms-of-service/) - 1. Introduction Welcome to About-Science.org ("we," "us," or "the Site"), an educational resource and science news publisher. By accessing or using https://about-science.org/, you agree to these Terms of Service ("Terms"). If you do not agree, please do not use the Site. These Terms apply to all visitors, users, and others who access the Site. 2.
- [All articles](https://about-science.org/all-articles/)

## Encyclopedia Entries

- [Inonotus obliquus: a chaga mushroom](https://about-science.org/inonotus-obliquus-a-chaga-mushroom/) - Chaga (Inonotus obliquus), a birch-parasitic fungus, features in traditional teas/supplements for potential antioxidants but has unproven benefits.
- [Paralepista flaccida: the tawny funnel mushroom](https://about-science.org/paralepista-flaccida-the-tawny-funnel-mushroom/) - Paralepista flaccida, or tawny funnel, is a common woodland mushroom. It features a funnel cap, sweet scent, and thin flesh but is unpalatable with toxic lookalikes.
- [Russula nobilis: beechwood sickener mushroom](https://about-science.org/russula-nobilis-beechwood-sickener-mushroom/) - Beechwood Sickener (Russula nobilis): a bright red, brittle, mycorrhizal russula of beech forests—ecologically vital but toxic, causing gut upset in humans.
- [Lepiota brunneoincarnata: the deadly dapperling mushroom](https://about-science.org/lepiota-brunneoincarnata-the-deadly-dapperling-mushroom/) - Deadly dapperling alert: Lepiota brunneoincarnata is a lawn mushroom with amatoxins that mimic mild stomach flu at first—but can end in liver failure.
- [Pholiota squarrosa: the shaggy scalycap mushroom](https://about-science.org/pholiota-squarrosa-the-shaggy-scalycap-mushroom/) - Pholiota squarrosa, the shaggy scalycap, is a distinctive scaly mushroom found in clusters on trees. Once considered edible, it's now deemed toxic.
- [Tylopilus felleus: the bitter bolete](https://about-science.org/tylopilus-felleus-the-bitter-bolete/) - Tylopilus felleus, the bitter bolete, is a widespread mushroom resembling edible boletes but distinguished by its pink pores, reticulated stem, and intensely bitter taste.
- [Paxillus involutus: brown roll-rim](https://about-science.org/paxillus-involutus-brown-roll-rim/) - Paxillus involutus, brown roll-rim mushroom, has a funnel-shaped brown cap with inrolled edges, decurrent gills.
- [Death Cap (Amanita phalloides)](https://about-science.org/death-cap-amanita-phalloides/) - The death cap (Amanita phalloides) is the world’s deadliest mushroom; just half a cap can kill an adult, often after a deceptive delay in symptoms.
- [Agaricus xanthodermus: The Yellow Stainer Mushroom](https://about-science.org/yellow-stainer-mushroom/) - Agaricus xanthodermus, the Yellow Stainer, is a toxic white mushroom with bright yellow bruising and a phenolic odor, often mistaken for edible Agaricus.
- [Rubroboletus satanas](https://about-science.org/rubroboletus-satanas/) - Rubroboletus satanas, the Devil's Bolete, is a large, toxic mushroom found in southern European forests on chalky soils, notable for its red pores and foul smell.

## Lessons

- [Atmosphere Layers, Gaseous Composition and Cloud Types](https://about-science.org/lesson/atmosphere-layers/) - Earth’s atmosphere is divided into layers, each with unique properties and functions that regulate climate, support life, and shield the planet from harmful radiation.
- [Is Anything Faster Than Light?](https://about-science.org/lesson/is-anything-faster-than-light/) - The cosmic speed of light shapes relativity, quantum entanglement, warp drives, and wormholes, defining a universal limit for motion, information, and causality in the universe.​
- [Is Earth Round?](https://about-science.org/lesson/is-earth-round/) - Earth is an oblate spheroid, not a perfect sphere! It bulges at the equator due to rotation. Explore the science behind Earth's shape and why it matters!
- [William Herschel and his amazing discoveries](https://about-science.org/lesson/william-herschel/) - From musician to cosmic cartographer: William Herschel’s telescopes revealed Uranus, double stars, nebulae, and the grand structure of our Galaxy.
- [The Science of Infection: A Biological Battlefield](https://about-science.org/lesson/what-is-infection/) - Infection is caused by harmful pathogens (bacteria, viruses, fungi, parasites) invade, multiply in body, causing disease via tissue damage/toxins.
- [General Virology: What Are Viruses, Are They Alive Or Not?](https://about-science.org/lesson/general-virology-what-are-viruses/) - Viruses are tiny invaders smaller than pinhead specks that hijack cells to replicate. They are not alive like human cells or bacteria, and to replicate they need a host cell.
- [Quantum Retrocausality — Can the Future Change the Past?](https://about-science.org/lesson/what-is-quantum-retrocausality/) - Quantum retrocausality: Future measurements reshape particle paths from the past via Wheeler's delayed choice, quantum erasers, absorber theory, and transactional "handshakes" across time.
- [Microbial Genetics: Plasmids, Gene Swapping & the Biotech Revolution](https://about-science.org/lesson/microbial-genetics/) - Bacterial genetics reveals rapid evolution through plasmids, horizontal gene transfer, bacteriophage cycles, and biotechnology applications like recombinant insulin and CRISPR gene editing.
- [Quantum Gravity — The Quest for the "Theory of Everything"](https://about-science.org/lesson/what-is-quantum-gravity/) - A journey to quantum gravity’s frontier, where Einstein’s smooth spacetime collides with quantum “pixels,” black holes, holograms, and bold ideas like strings and loops.
- [Quantum Entanglement: Einstein's "Spooky Action"](https://about-science.org/lesson/what-is-quantum-entanglement/) - Quantum entanglement links particles so a measurement on one instantly affects the other, no matter the distance—challenging our classical view of reality.
- [Quantum Tunneling: How Particles Walk Through Walls](https://about-science.org/lesson/what-is-quantum-tunneling/) - Quantum tunneling allows particles to pass through energy barriers even when lacking sufficient energy to overcome them classically, defying physics intuition.​
- [The Microscopic Cities Inside Us: A Deep Dive into Animal, Plant, and Fungal Cells](https://about-science.org/lesson/animal-plant-and-fungal-cells/) - Cells are the basic units of life, building all living organisms. They perform essential functions like energy production, growth, and reproduction.
- [Bacterial Physiology: Growth and Reproduction of Bacteria](https://about-science.org/lesson/bacterial-physiology-growth-and-reproduction-of-bacteria/) - Learn about bacterial reproduction: binary fission doubles colonies every 20 minutes through lag, log, stationary, and death phases. Explore nutrition, metabolism, and FtsZ division mechanics.
- [Planet Earth: Structure, Heat and Evolution](https://about-science.org/lesson/planet-earth-structure-heat-and-evolution/) - Earth's interior revealed: crust, mantle, liquid outer core, solid inner core. Seismic waves, Moho discontinuity, heat flow, mantle convection, iron catastrophe, and planet's formation/evolution.
- [What is Quantum Superposition: How to Be Everywhere at Once?](https://about-science.org/lesson/what-is-quantum-superposition/) - Quantum superposition: particles exist in multiple states at once until measured. Not mystical—it's proven science powering computers and even photosynthesis.
- [Schrödinger's Cat: The Famous Feline That Changed Physics](https://about-science.org/lesson/schrodingers-cat/) - Schrödinger's cat paradox: 1935 thought experiment where a cat exists in quantum superposition—both alive and dead—until observed, critiquing the Copenhagen interpretation.
- [The Copenhagen Interpretation: Why Reality Changes When We Look](https://about-science.org/lesson/what-is-the-copenhagen-interpretation/) - This lesson explains the Copenhagen interpretation of quantum mechanics, detailing its principles, history, and impact on our understanding of measurement and reality
- [The Electron Paradox: are electrons particles or waves?](https://about-science.org/lesson/are-electrons-particles-or-waves/) - This lesson explores the wave-particle duality of electrons, tracing their discovery, experimental evidence, and the paradoxes at the heart of quantum mechanics.
- [What Is Quantum Physics?](https://about-science.org/lesson/what-is-quantum-physics/) - Quantum physics explores the strange behavior of particles like photons and electrons at tiny scales. This lesson simplifies its key principles, history, phenomena, and modern applications.
- [Venus — Earth's Toxic Twin and the Ultimate Greenhouse](https://about-science.org/lesson/planet-venus/) - Planet Venus: brightest night-sky object after Moon, yet a scorching hellscape (470°C, 90 atm pressure, acid clouds). Lesson covers atmosphere, greenhouse effect, volcanoes, retrograde spin, Soviet probes.
- [The Solar System](https://about-science.org/lesson/the-solar-system/) - Solar System basics for kids: learn how the Sun, 8 planets, moons and other bodies interact through gravity, their orbits, temperatures, and unique fun facts.
- [The Invisible Universe: Introduction to Microbiology](https://about-science.org/lesson/the-invisible-universe-introduction-to-microbiology/) - Intro to microbiology lesson on microbes: bacteria, fungi, viruses, protozoa, agar, pure culture, nutrient media, and streak plate method for growing bacteria.
- [Mercury — Closest to the Sun](https://about-science.org/lesson/mercury-closest-to-the-sun/) - Explore planet Mercury—the Sun’s elusive “ghost planet.” Learn why it’s so hard to see, its fiery core, icy extremes, and the violent story of its formation.
- [Orbital Mechanics: How Planets Move and Why They Don't Fall](https://about-science.org/lesson/orbital-mechanics-how-planets-move-and-why-they-dont-fall/) - Solar System orbital mechanics lesson explores gravity's role in elliptical orbits, prograde motion, Sun's 99.87% mass dominance, Titius-Bode patterns, and retrograde anomalies.

## Quizzes

- [Planet Venus Online Test](https://about-science.org/quizzes/planet-venus-online-test/) - Venus: Earth’s fiery twin—hottest planet, with a thick CO₂ atmosphere, crushing pressure, and retrograde rotation.
- [Planet Mercury Online Test](https://about-science.org/quizzes/planet-mercury-online-test/) - Online test about planet Mercury: the Solar System’s smallest, fastest planet—closest to the Sun, with extreme temperatures, a huge iron core, and no moons.
- [Solar System Online Test](https://about-science.org/quizzes/solar-system-online-test/) - Test your Solar System knowledge with an interactive multiple‑choice quiz! Learn key facts, get instant feedback, and improve with every attempt.

## Categories

- [Astronomy](https://about-science.org/astronomy/)
- [Biology](https://about-science.org/biology/)
- [Great Scientists](https://about-science.org/great-scientists/)
- [Quantum Physics](https://about-science.org/quantum-physics/)
- [Physics](https://about-science.org/physics/)
- [Neuroscience](https://about-science.org/neuroscience/)
- [Science experiments](https://about-science.org/science-experiments/)

## Tags

- [Moon](https://about-science.org/tag/moon/)
- [History of Science](https://about-science.org/tag/history-of-science/)
- [Cells](https://about-science.org/tag/cells/)
- [Earth](https://about-science.org/tag/earth/)
- [DNA](https://about-science.org/tag/dna/)
- [Molecular Biology](https://about-science.org/tag/molecular-biology/)
- [Mushrooms](https://about-science.org/tag/mushrooms/)

## Libraries

- [Mushrooms](https://about-science.org/library/mushrooms/)
- [Poisonous mushrooms](https://about-science.org/library/poisonous-mushrooms/)
- [Inedible mushrooms](https://about-science.org/library/inedible-mushrooms/)

## Lesson Categories

- [Astronomy](https://about-science.org/lessons/astronomy/)
- [Biology](https://about-science.org/lessons/biology/)
- [Solar System](https://about-science.org/lessons/solar-system/)
- [Microbiology](https://about-science.org/lessons/microbiology/)
- [Physics](https://about-science.org/lessons/physics/)
- [Quantum Physics](https://about-science.org/lessons/quantum-physics/)
- [Great Scientists](https://about-science.org/lessons/great-scientists/)
- [Earth Science](https://about-science.org/lessons/earth-science/)

## Quiz Categories

- [Astronomy Tests](https://about-science.org/quiz-category/astronomy-tests/)