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At least a five-sentence introduction to the major fields.
*# [[Test-wp/new/विज्ञान]]
# [[en:Scientific method|Scientific method]]
=== Astronomy ===
# '''[[en:Astronomy|Astronomy]]'''
# [[en:Asteroid|Asteroid]]
# '''[[en:Big Bang|Big Bang]]'''
# [[en:Black hole|Black hole]]
# [[en:Comet|Comet]]
# '''[[en:Galaxy|Galaxy]]'''
## [[en:Milky Way|Milky Way]]
# [[en:Light year|Light year]]
# '''[[en:Moon|Moon]]'''
# '''[[en:Planet|Planet]]'''
## '''[[en:Earth|Earth]]'''
## [[en:Jupiter (planet)|Jupiter]]
## [[en:Mars (planet)|Mars]]
## [[en:Mercury (planet)|Mercury]]
## [[en:Neptune (planet)|Neptune]]
## [[en:Pluto (planet)|Pluto]]
## [[en:Saturn (planet)|Saturn]]
## [[en:Uranus (planet)|Uranus]]
## [[en:Venus (planet)|Venus]]
# [[en:Solar system|Solar system]]
# '''[[en:Star|Star]]'''
## '''[[en:Sun|Sun]]'''
# [[en:Universe|Universe]]
=== Biology ===
# '''[[en:Biology|Biology]]'''
# [[Biological materials]]
## '''[[en:DNA|DNA]]'''
## [[en:Enzyme|Enzyme]]
## [[en:Protein|Protein]]
# [[en:Botany|Botany]]
# '''[[en:Death|Death]]'''
## [[en:Suicide|Suicide]]
# [[en:Ecology|Ecology]]
## [[en:Endangered species|Endangered species]]
## [[en:Extinction|Extinction]]
# [[en:Domestication|Domestication]]
# '''[[en:Life|Life]]'''
# [[en:Scientific classification|Scientific classification]]
## [[en:Species|Species]]
=== Biological processes ===
# '''[[en:Metabolism|Metabolism]]'''
## [[en:Digestion|Digestion]]
### [[en:Excretion|Excretion]]
## '''[[en:Photosynthesis|Photosynthesis]]'''
## [[en:Respiration (physiology)|Respiration (physiology)]]
# '''[[en:Evolution|Evolution]]'''
## [[en:Human evolution|Human evolution]]
# '''[[en:Biological reproduction|Biological reproduction]]'''
## [[en:Asexual reproduction|Asexual]]
## [[Sexual reproduction]]
### [[ en:Heterosexuality|Heterosexuality]] ▼## [[en:Sexual reproduction|Sexual reproduction]]
### [[Homosexuality]]
▲### [[en:Heterosexuality|Heterosexuality]]
### [[en:Homosexuality|HomosexualityPregnancy]]
### [[en:Pregnancy|PregnancySex]]
#### [[en:Sex|SexFemale]]
#### [[en:Female|FemaleMale]]
#### [[en:Male|MaleSexual intercourse]]
### [[en:Sexual intercourse|Sexual intercourse]]
==== Anatomy ====
# '''[[en:Anatomy|Anatomy]]'''
# '''[[en:Cell|Cell]]'''
# [[en:Circulatory system|Circulatory system]]
## [[en:Blood|Blood]]
## [[en:Heart|Heart]]
# [[en:Endocrine system|Endocrine system]]
# [[en:Gastrointestinal tract|Gastrointestinal tract]]
## [[en:Colon (anatomy)|Large intestine]]
## [[en:Small intestine|Small intestine]]
## [[en:Liver|Liver]]
# [[en:Integumentary system|Integumentary system]]
## [[en:Breast|Breast]]
## [[en:Skin|Skin]]
# [[en:Nervous system|Nervous system]]
## [[en:Brain|Brain]]
## [[en:Sensory system|Sensory system]]
### [[en:Auditory system|Auditory system]]
#### [[en:Ear|Ear]]
### [[en:Gustatory system|Gustatory system]]
### [[en:Olfactory system|Olfactory system]]
### [[en:Somatosensory system|Somatosensory system]]
### [[en:Visual system|Visual system]]
#### [[en:Eye|Eye]]
# [[en:Reproductive system|Reproductive system]]
## [[en:Penis|Penis]]
## [[en:Vagina|Vagina]]
# [[en:Respiratory system|Respiratory system]]
## [[en:Lung|Lung]]
# [[en:Skeleton|Skeleton]]
==== Health and medicine ====
# '''[[en:Medicine|Medicine]]'''
# [[en:Addiction|Addiction]]
## [[en:Alcoholism|Alcoholism]]
### [[en:Cirrhosis|Cirrhosis]]
## [[en:Drug addiction|Drug addiction]]
# '''[[en:Cancer|Cancer]]'''
## [[en:Lung cancer|Lung cancer]]
# [[en:Cholera|Cholera]]
# [[en:Dentistry|Dentistry]]
# [[en:Diabetes mellitus|Diabetes mellitus]]
# [[en:Disability|Disability]]
## [[en:Blindness|Blindness]]
## [[en:Hearing impairment|Hearing impairment]]
## [[en:Mental illness|Mental illness]]
# '''[[en:Disease|Disease]]'''
# [[en:Medication|Drugs]]
## [[en:Caffeine|Caffeine]]
## [[en:Cannabis|Cannabis]]
## [[en:Cocaine|Cocaine]]
## [[en:Ethanol|Ethanol]]
## [[en:Nicotine|Nicotine]]
### [[en:Tobacco|Tobacco]]
## [[en:Opium|Opium]]
# [[en:Dysentery|Dysentery]]
# [[en:Health|Health]]
# [[en:Heart disease|Heart disease]]
# [[en:Hypertension|Hypertension]]
# '''[[en:Malaria|Malaria]]'''
# [[en:Malnutrition|Malnutrition]]
# [[en:Obesity|Obesity]]
# [[en:Pneumonia|Pneumonia]]
# [[en:Sexually transmitted disease|Sexually transmitted disease]]
## '''[[en:AIDS|AIDS]]'''
## [[en:Syphilis|Syphilis]]
# [[en:Stroke|Stroke]]
# [[en:Tuberculosis|Tuberculosis]]
# '''[[en:Virus|Virus]]'''
## '''[[en:Influenza|Influenza]]'''
### [[en:H5N1|H5N1]]
## [[en:Smallpox|Smallpox]]
==== Organisms ====
# '''[[en:Organism|Organism]]'''
# '''[[en:Animal|Animal]]'''
## [[en:Arthropod|Arthropod]]
### '''[[en:Insect|Insect]]'''
#### [[en:Ant|Ant]]
#### [[en:Bee|Bee]]
#### [[en:Butterfly|Butterfly]]
### [[en:Arachnid|Arachnid]]
## [[en:Chordate|Chordate]]
### '''[[en:Amphibian|Amphibian]]'''
#### [[en:Frog|Frog]]
### '''[[en:Bird|Bird]]'''
#### [[en:Dove|Dove]]
#### [[en:Eagle|Eagle]]
### '''[[en:Fish|Fish]]'''
#### [[en:Shark|Shark]]
### '''[[en:Mammal|Mammal]]'''
#### [[en:Ape|Ape]]
##### '''[[en:Human|Human]]'''
#### [[en:Bat|Bat]]
#### [[en:Bear|Bear]]
#### [[en:Camel|Camel]]
#### [[en:Cat|Cat]]
#### [[en:Cattle|Cattle]]
#### [[en:Dog|Dog]]
#### [[en:Dolphin|Dolphin]]
#### [[en:Elephant|Elephant]]
##### [[en:Mammoth|Mammoth]]
#### [[en:Horse|Horse]]
#### [[en:Sheep|Sheep]]
#### [[en:Lion|Lion]]
#### [[en:Pig|Pig]]
#### [[en:Whale|Whale]]
### '''[[en:Reptile|Reptile]]'''
#### [[en:Dinosaur|Dinosaur]]
#### [[en:Snake|Snake]]
# [[en:Archaea|Archaea]]
# '''[[en:Bacteria|Bacteria]]'''
# '''[[en:Fungus|Fungus]]'''
# '''[[en:Plant|Plant]]'''
## [[en:Flower|Flower]]
## [[en:Tree|Tree]]
# [[en:Protist|Protist]]
=== Chemistry ===
# '''[[en:Chemistry|Chemistry]]'''
# [[en:Biochemistry|Biochemistry]]
# [[en:Chemical compound|Chemical compound]]
## [[en:Acid|Acid]]
## [[en:Base (chemistry)|Base (chemistry)]]
## [[en:Salt|Salt]]
# '''[[en:Chemical element|Chemical element]]'''
## [[en:List of elements|List of elements]]
## [[en:Periodic table|Periodic table]]
## [[en:Aluminium|Aluminium]]
## [[en:Carbon|Carbon]]
## [[en:Copper|Copper]]
## '''[[en:Gold|Gold]]'''
## [[en:Helium|Helium]]
## '''[[en:Hydrogen|Hydrogen]]'''
## '''[[en:Iron|Iron]]'''
## [[en:Lithium|Lithium]]
## [[en:Neon|Neon]]
## [[en:Nitrogen|Nitrogen]]
## '''[[en:Oxygen|Oxygen]]'''
## [[en:Silver|Silver]]
## [[en:Tin|Tin]]
## [[en:Zinc|Zinc]]
# '''[[en:Metal|Metal]]'''
## [[en:Alloy|Alloy]]
### [[en:Brass|Brass]]
### [[en:Bronze|Bronze]]
### [[en:Steel|Steel]]
# [[en:Organic chemistry|Organic chemistry]]
## [[en:Alcohol|Alcohol]]
## [[en:Carbohydrate|Carbohydrate]]
## [[en:Hormone|Hormone]]
## [[en:Lipid|Lipid]]
# '''[[en:Phase (matter)|Phase (matter)]]'''
## [[en:Gas|Gas]]
## [[en:Liquid|Liquid]]
## [[en:Plasma (physics)|Plasma]]
## [[en:Solid|Solid]]
=== Weather, climate and geology ===
# [[en:Avalanche|Avalanche]]
# '''[[en:Climate|Climate]]'''
## [[en:ENSO|ENSO]]
## [[en:Global warming|Global warming]]
# [[en:Earthquake|Earthquake]]
# '''[[en:Geology|Geology]]'''
## '''[[en:Mineral|Mineral]]'''
### [[en:Diamond|Diamond]]
### [[en:Limestone|Limestone]]
## [[en:Plate tectonics|Plate tectonics]]
## '''[[en:Rock|Rock]]'''
### [[en:Basalt|Basalt]]
### [[en:Flint|Flint]]
# [[en:Natural disaster|Natural disaster]]
# [[en:Volcano|Volcano]]
# '''[[en:Weather|Weather]]'''
## [[en:Cloud|Cloud]]
## [[en:Flood|Flood]]
### [[en:Tsunami|Tsunami]]
## [[en:Rain|Rain]]
### [[en:Acid rain|Acid rain]]
### [[en:Snow|Snow]]
## [[en:Tornado|Tornado]]
## [[en:Tropical cyclone|Tropical cyclone]]
=== Physics ===
# '''[[en:Physics|Physics]]'''
# [[en:Acceleration|Acceleration]]
# '''[[en:Atom|Atom]]'''
## [[en:Electron|Electron]]
## [[en:Neutron|Neutron]]
## [[en:Proton|Proton]]
# '''[[en:Energy|Energy]]'''
## [[en:Electromagnetic radiation|Electromagnetic radiation]]
### [[en:Infrared|Infrared]]
### [[en:Visual spectrum|Visual spectrum]]
#### [[en:Black|Black]]
#### '''[[en:Color|Color]]'''
##### [[en:Blue|Blue]]
##### [[en:Green|Green]]
##### [[en:Red|Red]]
##### [[en:Yellow|Yellow]]
#### [[en:White|White]]
### [[en:Ultraviolet|Ultraviolet]]
### [[en:Gamma ray|Gamma ray]]
# '''[[en:Force|Force]]'''
## [[en:Electromagnetism|Electromagnetism]]
## [[en:Gravitation|Gravitation]]
## [[en:Nuclear force|Nuclear force]]
# [[en:Isotope|Isotope]]
# [[en:Light|Light]]
# '''[[en:Mass|Mass]]'''
# '''[[en:Molecule|Molecule]]'''
# [[en:Quantum mechanics|Quantum mechanics]]
# '''[[en:Sound|Sound]]'''
# '''[[en:Speed|Speed]]'''
# [[en:Theory of relativity|Theory of relativity]]
# '''[[en:Time|Time]]'''
# [[en:Velocity|Velocity]]
# '''[[en:Weight|Weight]]'''
=== Timekeeping ===
# '''[[en:Calendar|Calendar]]'''
## [[en:Chinese calendar|Chinese calendar]]
## [[en:Gregorian calendar|Gregorian calendar]]
# '''[[en:Day|Day]]'''
# '''[[en:Month|Month]]'''
## [[en:January|January]]
## [[en:February|February]]
## [[en:March|March]]
## [[en:April|April]]
## [[en:May|May]]
## [[en:June|June]]
## [[en:July|July]]
## [[en:August|August]]
## [[en:September|September]]
## [[en:October|October]]
## [[en:November|November]]
## [[en:December|December]]
# [[en:Time zone|Time zone]]
## [[en:Daylight saving time|Daylight saving time]]
# [[en:Week|Week]]
# '''[[en:Year|Year]]'''
## [[en:Leap year|Leap year]]
==Etymology==
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