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Atlantic Ocean
https://en.wikipedia.org/wiki/Atlantic_Ocean
The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for separating the New World of the Americas (North America and South America) from th...
geography
8,122
736
Albert Einstein
https://en.wikipedia.org/wiki/Albert_Einstein
Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist best known for developing the theory of relativity. Einstein also made important contributions to quantum theory. His mass–energy equivalence formula , which arises from special relativity, has been called "the world's most famous equa...
biographies
14,617
775
Algorithm
https://en.wikipedia.org/wiki/Algorithm
In mathematics and computer science, an algorithm () is a finite sequence of mathematically rigorous instructions, typically used to solve a class of specific problems or to perform a computation. Algorithms are used as specifications for performing calculations and data processing. More advanced algorithms can use con...
computer_science
5,020
842
Aegean Sea
https://en.wikipedia.org/wiki/Aegean_Sea
The Aegean Sea is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some . In the north, the Aegean is connected to the Marmara Sea, which in turn connects to the Black Sea, by the straits of the Dardanelles and the Bosphorus, ...
geography
4,488
874
Ancient Egypt
https://en.wikipedia.org/wiki/Ancient_Egypt
Ancient Egypt was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150BC (according to conventional Egyptian chronology), when Upper and Lower Egypt were amalgamated by Menes, who is believed by the majority of Egyptologists t...
ancient_medieval
12,036
1016
Achill Island
https://en.wikipedia.org/wiki/Achill_Island
Achill Island (; ) is located off the west coast of Ireland in the historical barony of Burrishoole, County Mayo. It is the largest of the Irish isles and has an area of approximately . Achill had a population of 2,345 in the 2022 census. The island, which has been connected to the mainland by a bridge since 1887, is s...
geography
3,551
1206
Atomic orbital
https://en.wikipedia.org/wiki/Atomic_orbital
In quantum mechanics, an atomic orbital () is a function describing the location and wave-like behavior of an electron in an atom. This function describes an electron's charge distribution around the atom's nucleus, and can be used to calculate the probability of finding an electron in a specific region around the nucl...
physics
8,614
1208
Alan Turing
https://en.wikipedia.org/wiki/Alan_Turing
Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. He was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with t...
biographies
8,250
1750
Andaman Islands
https://en.wikipedia.org/wiki/Andaman_Islands
The Andaman Islands () are an archipelago, made up of 200 islands, in the northeastern Indian Ocean about southwest off the coasts of Myanmar's Ayeyarwady Region. Together with the Nicobar Islands to their south, the Andamans serve as a maritime boundary between the Bay of Bengal to the west and the Andaman Sea to the...
geography
4,031
1914
Antimicrobial resistance
https://en.wikipedia.org/wiki/Antimicrobial_resistance
Antimicrobial resistance (AMR or AR) occurs when microbes evolve mechanisms that protect them from antimicrobials, which are drugs used to treat infections. This resistance affects all classes of microbes, including bacteria (antibiotic resistance), viruses (antiviral resistance), parasites (antiparasitic resistance), ...
biology
12,539
2844
History of atomic theory
https://en.wikipedia.org/wiki/History_of_atomic_theory
Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries. Initially, it referred to a hypothetical concept of there being some fundamental particle of matter, too small to be seen by the n...
physics
8,373
3335
Baltic Sea
https://en.wikipedia.org/wiki/Baltic_Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain regions. It is the world's largest brackish water basin. The sea stretches from 53°N to 66°N latitude and from 10°E...
geography
10,781
3386
Black Sea
https://en.wikipedia.org/wiki/Black_Sea
The Black Sea is a marginal sea lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine. The Black Sea is supplied by major rivers, principally the Danube, Dnieper and Dnie...
geography
7,539
3469
British Virgin Islands
https://en.wikipedia.org/wiki/British_Virgin_Islands
The British Virgin Islands (BVI), officially the Virgin Islands,According to the Virgin Islands Constitution Order, 2007, the territory's official name is simply 'Virgin Islands'. are a British Overseas Territory in the Caribbean, to the east of Puerto Rico and the US Virgin Islands and north-west of Anguilla. The isla...
geography
5,333
3793
Battle of Bosworth Field
https://en.wikipedia.org/wiki/Battle_of_Bosworth_Field
The Battle of Bosworth or Bosworth Field ( ) was the last significant battle of the Wars of the Roses, the civil war between the houses of Lancaster and York that extended across England and Wales in the latter half of the 15th century. Fought on 22 August 1485, the battle was won by an alliance of Lancastrians and dis...
wars_military
9,216
4436
Brownian motion
https://en.wikipedia.org/wiki/Brownian_motion
Brownian motion is the random motion of particles suspended in a medium (a liquid or a gas). The traditional mathematical formulation of Brownian motion is that of the Wiener process, which is often called Brownian motion, even in mathematical sources. This motion pattern typically consists of random fluctuations in ...
physics
4,153
4925
Blue whale
https://en.wikipedia.org/wiki/Blue_whale
The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. Reaching a maximum confirmed length of and weighing up to , it is the largest animal known to have ever existed. The blue whale's long and slender body can be of various shades of greyish-blue on its upper surface and somewhat lighter undern...
nature_wildlife
5,205
5468
Cayman Islands
https://en.wikipedia.org/wiki/Cayman_Islands
The Cayman Islands () is a self-governing British Overseas Territory in the western Caribbean. It is the largest by population of all the British Overseas Territories. The territory comprises the three islands of Grand Cayman, Cayman Brac and Little Cayman, which are located south of Cuba and north-east of Honduras, b...
geography
7,716
5500
Christmas Island
https://en.wikipedia.org/wiki/Christmas_Island
Christmas Island, officially the Territory of Christmas Island, is an Australian external territory in the Indian Ocean comprising the island of the same name. It is about south of Java and Sumatra and about north-west of the closest point on the Australian mainland. It has an area of .Shire of Christmas Island Chris...
geography
6,767
5510
Clipperton Island
https://en.wikipedia.org/wiki/Clipperton_Island
Clipperton Island ( ; ), also known as Clipperton Atoll and previously as Clipperton's Rock, is an uninhabited French coral atoll in the eastern Pacific Ocean. The only French territory in the North Pacific, Clipperton is from Paris, France; from Papeete, French Polynesia; and from Acapulco, Mexico. Clipperton was...
geography
6,494
5617
Creutzfeldt–Jakob disease
https://en.wikipedia.org/wiki/Creutzfeldt–Jakob_disease
Creutzfeldt–Jakob disease (CJD) is an incurable, invariably fatal, neurodegenerative disease belonging to the transmissible spongiform encephalopathy (TSE) group. Early symptoms include memory problems, behavioral changes, poor coordination, visual disturbances and auditory disturbances. Later symptoms include dementia...
medicine_health
4,770
5750
Cognitive behavioral therapy
https://en.wikipedia.org/wiki/Cognitive_behavioral_therapy
Cognitive behavioral therapy (CBT) is a form of psychotherapy that aims to reduce symptoms of various mental health conditions, primarily depression, and disorders such as PTSD and anxiety disorders. This therapy focuses on challenging unhelpful and irrational negative thoughts and beliefs, referred to as 'self-talk' a...
medicine_health
9,001
5876
Coronary artery disease
https://en.wikipedia.org/wiki/Coronary_artery_disease
Coronary artery disease (CAD), also called coronary heart disease (CHD), or ischemic heart disease (IHD), is a type of heart disease involving the reduction of blood flow to the cardiac muscle due to a build-up of atheromatous plaque in the arteries of the heart. It is the most common of the cardiovascular diseases. CA...
medicine_health
4,869
6115
P versus NP problem
https://en.wikipedia.org/wiki/P_versus_NP_problem
The P versus NP problem is a major unsolved problem in theoretical computer science. Informally, it asks whether every problem whose solution can be quickly verified can also be quickly solved. Here, "quickly" means an algorithm exists that solves the task and runs in polynomial time (as opposed to, say, exponential t...
computer_science
5,662
6355
Chloroplast
https://en.wikipedia.org/wiki/Chloroplast
A chloroplast () is a type of organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. Chloroplasts have a high concentration of chlorophyll pigments which capture the energy from sunlight and convert it to chemical energy and release oxygen. The chemical energy created is then used to...
biology
12,565
7012
Chagas disease
https://en.wikipedia.org/wiki/Chagas_disease
Chagas disease, also known as American trypanosomiasis, is a tropical parasitic disease caused by Trypanosoma cruzi. It is spread mostly by insects in the subfamily Triatominae, known as "kissing bugs". The symptoms change throughout the infection. In the early stage, symptoms are typically either not present or mild a...
medicine_health
4,961
7172
Chemotherapy
https://en.wikipedia.org/wiki/Chemotherapy
Chemotherapy (often abbreviated chemo, sometimes CTX and CTx) is the type of cancer treatment that uses one or more anti-cancer drugs (chemotherapeutic agents or alkylating agents) in a standard regimen. Chemotherapy may be given with a curative intent (which almost always involves combinations of drugs), or it may aim...
medicine_health
10,028
7376
Cosmic microwave background
https://en.wikipedia.org/wiki/Cosmic_microwave_background
The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dark. However, a sufficiently sensitive radio telescope detects a faint backgro...
physics
7,492
7543
Computational complexity theory
https://en.wikipedia.org/wiki/Computational_complexity_theory
In theoretical computer science and mathematics, computational complexity theory focuses on classifying computational problems according to their resource usage, and explores the relationships between these classifications. A computational problem is a task solved by a computer. A computation problem is solvable by mec...
computer_science
5,197
7783
Coriolis force
https://en.wikipedia.org/wiki/Coriolis_force
In physics, the Coriolis force is a pseudo force that acts on objects in motion within a frame of reference that rotates with respect to an inertial frame. In a reference frame with clockwise rotation, the force acts to the left of the motion of the object. In one with anticlockwise (or counterclockwise) rotation, the ...
physics
7,394
7844
Chimpanzee
https://en.wikipedia.org/wiki/Chimpanzee
The chimpanzee (; Pan troglodytes), also simply known as the chimp, is a species of great ape native to the forests and savannahs of tropical Africa. It has four confirmed subspecies and a fifth proposed one. When its close relative, the bonobo, was more commonly known as the pygmy chimpanzee, this species was often ca...
nature_wildlife
7,095
7955
DNA
https://en.wikipedia.org/wiki/DNA
Deoxyribonucleic acid (;: DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic ac...
biology
9,443
8303
Down syndrome
https://en.wikipedia.org/wiki/Down_syndrome
Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features. The parents of the affected indiv...
medicine_health
7,985
9236
Evolution
https://en.wikipedia.org/wiki/Evolution
Evolution is the change in the heritable characteristics of biological populations over successive generations. It occurs when evolutionary processes such as genetic drift and natural selection act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successiv...
biology
10,609
9312
Endocrine system
https://en.wikipedia.org/wiki/Endocrine_system
The endocrine system is a messenger system in an organism comprising feedback loops of hormones that are released by internal glands directly into the circulatory system and that target and regulate distant organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems. In humans, the ...
medicine_health
3,993
9426
Electromagnetic radiation
https://en.wikipedia.org/wiki/Electromagnetic_radiation
In physics, electromagnetic radiation (EMR) or electromagnetic wave (EMW) is a self-propagating wave of the electromagnetic field that carries momentum and radiant energy through space.* p 430: "These waves... require no medium to support their propagation. Traveling electromagnetic waves carry energy, and... the Poyn...
physics
7,111
9891
Entropy
https://en.wikipedia.org/wiki/Entropy
Entropy is a scientific concept, most commonly associated with states of disorder, randomness, or uncertainty. The term and the concept are used in diverse fields, from classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, and to the principles of info...
physics
9,001
10264
Enrico Fermi
https://en.wikipedia.org/wiki/Enrico_Fermi
Enrico Fermi (; 29 September 1901 – 28 November 1954) was an Italian and naturalized American physicist, renowned for being the creator of the world's first artificial nuclear reactor, the Chicago Pile-1, and a member of the Manhattan Project. He has been called the "architect of the nuclear age" and the "architect of ...
biographies
7,173
10350
Easter Rising
https://en.wikipedia.org/wiki/Easter_Rising
The Easter Rising (), also known as the Easter Rebellion, was an armed insurrection in Ireland during Easter Week in April 1916. The Rising was launched by Irish republicans against British rule in Ireland with the aim of establishing an independent Irish Republic while the United Kingdom was fighting the First World W...
political_movements
10,577
12266
Genetics
https://en.wikipedia.org/wiki/Genetics
Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Me...
biology
6,483
12401
Graph theory
https://en.wikipedia.org/wiki/Graph_theory
In mathematics and computer science, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects. A graph in this context is made up of vertices (also called nodes or points) which are connected by edges (also called arcs, links or lines). A distinction is mad...
computer_science
4,728
12590
Grace Hopper
https://en.wikipedia.org/wiki/Grace_Hopper
Grace Brewster Hopper (; December 9, 1906 – January 1, 1992) was an American computer scientist, mathematician, and United States Navy rear admiral. She was a pioneer of computer programming. Hopper was the first to devise the theory of machine-independent programming languages, and used this theory to develop the FLOW...
biographies
4,546
12644
Glycolysis
https://en.wikipedia.org/wiki/Glycolysis
The wide occurrence of glycolysis in other species indicates that it is an ancient metabolic pathway. Indeed, the reactions that make up glycolysis and its parallel pathway, the pentose phosphate pathway, can occur in the oxygen-free conditions of the Archean oceans, also in the absence of enzymes, catalyzed by metal i...
biology
6,797
12891
Gene therapy
https://en.wikipedia.org/wiki/Gene_therapy
Gene therapy is medical technology that aims to produce a therapeutic effect through the manipulation of gene expression or through altering the biological properties of living cells. The first attempt at modifying human DNA was performed in 1980, by Martin Cline, but the first successful nuclear gene transfer in huma...
medicine_health
9,432
13308
Hittites
https://en.wikipedia.org/wiki/Hittites
The Hittites () were an Anatolian Indo-European people who formed one of the first major civilizations of the Bronze Age in West Asia. Possibly originating from beyond the Black Sea, they settled in modern-day Turkey in the early 2nd millennium BC. The Hittites formed a series of polities in north-central Anatolia, inc...
ancient_medieval
9,139
13311
Hormone
https://en.wikipedia.org/wiki/Hormone
A hormone (from the Greek participle , "setting in motion") is a class of signaling molecules in multicellular organisms that are sent to distant organs or tissues by complex biological processes to regulate physiology and behavior. Hormones are required for the normal development of animals, plants and fungi. Due to t...
medicine_health
3,310
13654
Heat engine
https://en.wikipedia.org/wiki/Heat_engine
A heat engine is a system that transfers thermal energy to do mechanical or electrical work.Fundamentals of Classical Thermodynamics, 3rd ed. p. 159, (1985) by G. J. Van Wylen and R. E. Sonntag: "A heat engine may be defined as a device that operates in thermodynamic cycle and does a certain amount of net positive work...
physics
3,297
13833
Hash table
https://en.wikipedia.org/wiki/Hash_table
In computer science, a hash table is a data structure that implements an associative array, also called a dictionary or simply map; an associative array is an abstract data type that maps keys to values. A hash table uses a hash function to compute an index, also called a hash code, into an array of buckets or slots, f...
computer_science
3,940
14627
Isaac Newton
https://en.wikipedia.org/wiki/Isaac_Newton
Sir Isaac Newton (; ) was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, author, and inventor. He was a key figure in the Scientific Revolution and the Enlightenment that followed. His book (Mathematical Principles of Natural Philosophy), first published in 1687, achieved ...
biographies
13,610
14838
Inertial frame of reference
https://en.wikipedia.org/wiki/Inertial_frame_of_reference
In classical physics and special relativity, an inertial frame of reference (also called an inertial space or a Galilean reference frame) is a frame of reference in which objects exhibit inertia: they remain at rest or in uniform motion relative to the frame until acted upon by external forces. In such a frame, the law...
physics
5,549
15112
Wave interference
https://en.wikipedia.org/wiki/Wave_interference
In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference. The resultant wave may have greater amplitude (constructive interference) or lower amplitude (destructive interference) if the two waves are i...
physics
3,378
16217
Jaguar
https://en.wikipedia.org/wiki/Jaguar
The jaguar (Panthera onca) is a large cat species and the only living member of the genus Panthera that is native to the Americas. With a body length of up to and a weight of up to , it is the biggest cat species in the Americas and the third largest in the world. Its distinctively marked coat features pale yellow to ...
nature_wildlife
5,182
18203
Lambda calculus
https://en.wikipedia.org/wiki/Lambda_calculus
In mathematical logic, the lambda calculus (also written as λ-calculus) is a formal system for expressing computation based on function abstraction and application using variable binding and substitution. Untyped lambda calculus, the topic of this article, is a universal machine, a model of computation that can be used...
computer_science
6,433
19588
Mitochondrion
https://en.wikipedia.org/wiki/Mitochondrion
A mitochondrion () is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate (ATP), which is used throughout the cell as a source of chemical energy. They were discovered by Alber...
biology
9,885
19702
Mutation
https://en.wikipedia.org/wiki/Mutation
In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA. Mutations result from errors during DNA or viral replication, mitosis, or meiosis or other types of damage to DNA (such as pyrimidine dimers caused ...
biology
8,954
20408
Marie Curie
https://en.wikipedia.org/wiki/Marie_Curie
Maria Salomea Skłodowska-Curie (; ; 7 November 1867 – 4 July 1934), known as Marie Curie ( ; ), was a Polish and naturalised-French physicist and chemist who conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize, the first person to win a Nobel Prize twice, and the only person t...
biographies
6,582
21473
Nikola Tesla
https://en.wikipedia.org/wiki/Nikola_Tesla
Nikola Tesla (10 July 1856 – 7 January 1943) was a Serbian-American engineer, futurist, and inventor. He is known for his contributions to the design of the modern alternating current (AC) electricity supply system. Born and raised in the Austrian Empire, Tesla first studied engineering and physics in the 1870s withou...
biographies
9,729
21523
Neural network (machine learning)
https://en.wikipedia.org/wiki/Neural_network_(machine_learning)
In machine learning, a neural network or neural net (NN), also called artificial neural network (ANN), is a computational model inspired by the structure and functions of biological neural networks. A neural network consists of connected units or nodes called artificial neurons, which loosely model the neurons in the ...
computer_science
8,720
24408
Polar bear
https://en.wikipedia.org/wiki/Polar_bear
The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed. The polar bear is the largest extant species of bear and land carnivore by body mass, with adult males weighing . The species is sexually dimorphic, as adu...
nature_wildlife
7,895
24544
Photosynthesis
https://en.wikipedia.org/wiki/Photosynthesis
upright=1.5|thumb|right|Composite image showing the global distribution of photosynthesis, including both oceanic phytoplankton and terrestrial vegetation. Dark red and blue-green indicate regions of high photosynthetic activity in the ocean and on land, respectively. Photosynthesis ( ) is a system of biological proce...
biology
7,434
25523
Richard Feynman
https://en.wikipedia.org/wiki/Richard_Feynman
Richard Phillips Feynman (; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for whi...
biographies
9,515
25717
Regular expression
https://en.wikipedia.org/wiki/Regular_expression
A regular expression (shortened as regex or regexp), sometimes referred to as a rational expression, is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. Regular ...
computer_science
8,791
25762
Russian Revolution
https://en.wikipedia.org/wiki/Russian_Revolution
The Russian Revolution was a period of political and social change in Russia, starting in 1917. This period saw Russia abolish its monarchy and adopt a socialist form of government following two successive revolutions and a civil war. It can be seen as the precursor for other revolutions that occurred in the aftermath ...
political_movements
10,651
26088
Red wolf
https://en.wikipedia.org/wiki/Red_wolf
The red wolf (Canis rufus) is a canine native to the southeastern United States. Its size is intermediate between the coyote (Canis latrans) and gray wolf (Canis lupus). The red wolf's taxonomic classification as being a separate species has been contentious for nearly a century, being classified either as a subspecie...
nature_wildlife
7,923
28442
Sorting algorithm
https://en.wikipedia.org/wiki/Sorting_algorithm
In computer science, a sorting algorithm is an algorithm that puts elements of a list into an order. The most frequently used orders are numerical order and lexicographical order, and either ascending or descending. Efficient sorting is important for optimizing the efficiency of other algorithms (such as search and mer...
computer_science
6,261
29328
Six-Day War
https://en.wikipedia.org/wiki/Six-Day_War
The Six-Day War, also known as the June war, 1967 Arab–Israeli war or third Arab–Israeli war, was fought between Israel and a coalition of Arab states, primarily Egypt, Syria, and Jordan from 5 to 10June 1967. Military hostilities broke out amid poor relations between Israel and its Arab neighbors, who had been observ...
wars_military
17,532
30075
Tiger
https://en.wikipedia.org/wiki/Tiger
The tiger (Panthera tigris) is a large cat and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two subspecies...
nature_wildlife
8,539
32610
Vikings
https://en.wikipedia.org/wiki/Vikings
Vikings were a seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9–22. They voyaged as far as the Mediterranean, North Africa, the Middle East, Greenland, ...
ancient_medieval
14,662
36197
1948 Arab–Israeli War
https://en.wikipedia.org/wiki/1948_Arab–Israeli_War
The 1948 Arab–Israeli War, also known as the First Arab–Israeli War, followed the civil war in Mandatory Palestine as the second and final stage of the 1948 Palestine war. The civil war became a war of separate states with the Israeli Declaration of Independence on 14 May 1948, the end of the British Mandate for Palest...
wars_military
20,238
42720
Second Boer War
https://en.wikipedia.org/wiki/Second_Boer_War
The Second Boer War (, , 11 October 189931 May 1902), also known as the Boer War, Transvaal War, Anglo–Boer War, or South African War, was a conflict fought between the British Empire and the Boer republics (the South African Republic and Orange Free State) over Britain's influence in Southern Africa. The Witwatersran...
wars_military
16,358
43449
Ming dynasty
https://en.wikipedia.org/wiki/Ming_dynasty
The Ming dynasty, officially the Great Ming, was an imperial dynasty of China that ruled from 1368 to 1644, following the collapse of the Mongol-led Yuan dynasty. The Ming was the last imperial dynasty of China ruled by the Han people, the majority ethnic group in China. Although the primary capital of Beijing fell in ...
ancient_medieval
11,961
43455
Tang dynasty
https://en.wikipedia.org/wiki/Tang_dynasty
The Tang dynasty (, ; ), or the Tang Empire, was an imperial dynasty of China that ruled from 618 to 907, with an interregnum between 690 and 705. It was preceded by the Sui dynasty and followed by the Five Dynasties and Ten Kingdoms period. Historians generally regard the Tang as a high point in Chinese civilisation, ...
ancient_medieval
14,880
43460
Han dynasty
https://en.wikipedia.org/wiki/Han_dynasty
The Han dynasty was an imperial dynasty of China (202 BC9 AD, 25–220 AD) established by Liu Bang and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–206 BC) and a warring interregnum known as the Chu–Han Contention (206–202 BC), and it was succeeded by the Three Kingdoms period (...
ancient_medieval
11,312
43461
Qin dynasty
https://en.wikipedia.org/wiki/Qin_dynasty
The Qin dynasty ( ) was the first imperial dynasty of China. It is named for its progenitor state of Qin, a fief of the confederal Zhou dynasty (–256 BC). Beginning in 230 BC, the Qin under King Ying Zheng engaged in a series of wars conquering each of the rival states that had previously pledged fealty to the Zhou. Th...
ancient_medieval
5,070
43619
Great white shark
https://en.wikipedia.org/wiki/Great_white_shark
The great white shark (Carcharodon carcharias), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is the only known surviving species of its genus Carcharodon. The great white shark is no...
nature_wildlife
8,085
44303
Leopard
https://en.wikipedia.org/wiki/Leopard
The leopard (Panthera pardus) is one of the five extant cat species in the genus Panthera. It has a pale yellowish to dark golden fur with dark spots grouped in rosettes. Its body is slender and muscular, reaching a length of with a long tail and a shoulder height of . Males typically weigh , and females . The leopa...
nature_wildlife
4,831
45609
Cheetah
https://en.wikipedia.org/wiki/Cheetah
The cheetah (Acinonyx jubatus) is a large cat and the fastest land animal. It has a tawny to creamy white or pale buff fur that is marked with evenly spaced, solid black spots. The head is small and rounded, with a short snout and black tear-like facial streaks. It reaches at the shoulder, and the head-and-body length...
nature_wildlife
11,298
49033
Epigenetics
https://en.wikipedia.org/wiki/Epigenetics
Epigenetics is the study of changes in gene expression that occur without altering the DNA sequence. The Greek prefix epi- (ἐπι- "over, outside of, around") in epigenetics implies features that are "on top of" or "in addition to" the traditional DNA-sequence-based mechanism of inheritance. Epigenetics usually involve...
biology
9,614
49855
Umayyad Caliphate
https://en.wikipedia.org/wiki/Umayyad_Caliphate
The Umayyad Caliphate or Umayyad Empire (; ) was the second caliphate established after the death of the Islamic prophet Muhammad and was ruled by the Umayyad dynasty from 661 to 750. It succeeded the Rashidun Caliphate, of which the third caliph, Uthman ibn Affan, was also a member of the Umayyad clan. The Umayyad fam...
ancient_medieval
10,534
49856
Abbasid Caliphate
https://en.wikipedia.org/wiki/Abbasid_Caliphate
The Abbasid Caliphate or Abbasid Empire was the third Islamic caliphate, founded by a descendant of Muhammad's uncle, Abbas ibn Abd al-Muttalib (566–653 CE), from whom the dynasty derives its name. The preceding Umayyad Caliphate was overthrown by the Abbasid Revolution in 750 CE (132 AH), after which the Abbasids rule...
ancient_medieval
11,213
51054
American black bear
https://en.wikipedia.org/wiki/American_black_bear
The American black bear (Ursus americanus), or simply black bear, is a species of medium-sized bear which is endemic to North America. It is the continent's smallest and most widely distributed bear species. It is an omnivore, with a diet varying greatly depending on season and location. It typically lives in largely f...
nature_wildlife
8,652
56978
Song dynasty
https://en.wikipedia.org/wiki/Song_dynasty
The Song dynasty ( ) was a unifying imperial dynasty of China that ruled from 960 to 1279. The dynasty was founded by Emperor Taizu of Song, who usurped the throne of the Later Zhou dynasty and went on to conquer the rest of the Ten Kingdoms, ending the Five Dynasties and Ten Kingdoms period. The Song often came into c...
ancient_medieval
10,098
57974
Battle of Britain
https://en.wikipedia.org/wiki/Battle_of_Britain
The Battle of Britain () was a military campaign of the Second World War, in which the Royal Air Force (RAF) and the Fleet Air Arm (FAA) of the Royal Navy defended the United Kingdom against large-scale attacks by Nazi Germany's air force, the Luftwaffe. It was the first major military campaign fought entirely by air f...
wars_military
20,595
60026
Guadalcanal campaign
https://en.wikipedia.org/wiki/Guadalcanal_campaign
The Guadalcanal campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower by the United States, was an Allied offensive against forces of the Empire of Japan in the Solomon Islands during the Pacific Theater of World War II. It was fought between 7 August 1942 and 9 February 1943, and involve...
wars_military
17,653
60520
Boxer Rebellion
https://en.wikipedia.org/wiki/Boxer_Rebellion
The Boxer Rebellion, also known as the Boxer Uprising, Boxer Movement, or Yihetuan Movement (), was an anti-foreign, anti-imperialist, and anti-Christian uprising in North China between 1899 and 1901, towards the end of the Qing dynasty, by the Society of Righteous and Harmonious Fists. Its members were known as the "B...
political_movements
11,723
66491
Socialist realism
https://en.wikipedia.org/wiki/Socialist_realism
Socialist realism, also known as socrealism (), was the official cultural doctrine of the Soviet Union that mandated an idealized representation of life under socialism in literature and the visual arts. The doctrine was first proclaimed by the First Congress of Soviet Writers in 1934 as approved as the only acceptable...
arts_entertainment
8,680
69980
Second Sino-Japanese War
https://en.wikipedia.org/wiki/Second_Sino-Japanese_War
The Second Sino-Japanese War was fought between the Republic of China and the Empire of Japan between 1937 and 1945, following a period of war localized to Manchuria that started in 1931. It is considered part of World War II, and often regarded as the beginning of World WarII in Asia. It was the largest Asian war in t...
wars_military
17,772
82991
Chamber music
https://en.wikipedia.org/wiki/Chamber_music
Chamber music is a form of classical music that is composed for a small group of instruments—traditionally a group that could fit in a palace chamber or a large room. Most broadly, it includes any art music that is performed by a small number of performers, with one performer to a part (in contrast to orchestral music,...
arts_entertainment
11,102
83620
Sonata form
https://en.wikipedia.org/wiki/Sonata_form
The sonata form (also sonata-allegro form or first movement form) is a musical structure generally consisting of three main sections: an exposition, a development, and a recapitulation. It has been used widely since the middle of the 18th century (the early Classical period). While it is typically used in the first mo...
arts_entertainment
7,416
85248
Theatre of the absurd
https://en.wikipedia.org/wiki/Theatre_of_the_absurd
The theatre of the absurd ( ) is a post–World War II designation for particular plays of absurdist fiction written by a number of primarily European playwrights in the late 1950s. It is also a term for the style of theatre the plays represent. The plays focus largely on ideas of existentialism and express what happens ...
arts_entertainment
6,141
99040
Free jazz
https://en.wikipedia.org/wiki/Free_jazz
Free jazz (also known as free form jazz) is a style of avant-garde jazz or an experimental approach to jazz improvisation that developed in the late 1950s and early 1960s, when musicians attempted to change or break down jazz conventions, such as regular tempos, tones, and chord changes. Musicians during this period ...
arts_entertainment
3,372
106128
First Crusade
https://en.wikipedia.org/wiki/First_Crusade
The First Crusade (1096–1099) was the first and most successful of a series of religious wars, or Crusades, which were initiated, supported and at times directed by the Latin Church in the Middle Ages. Their aim was to return the Holy Landwhich had been conquered by the Rashidun Caliphate in the 7th centuryto Christian...
wars_military
13,361
113302
Surface tension
https://en.wikipedia.org/wiki/Surface_tension
Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to float on a water surface without becoming even partly submerged. At liquid–air i...
chemistry
6,189
125297
Dynamic programming
https://en.wikipedia.org/wiki/Dynamic_programming
Dynamic programming is both a mathematical optimization method and an algorithmic paradigm. The method was developed by Richard Bellman in the 1950s and has found applications in numerous fields, such as aerospace engineering and economics. In both contexts it refers to simplifying a complicated problem by breaking it...
computer_science
6,252
140416
United States Agency for International Development
https://en.wikipedia.org/wiki/United_States_Agency_for_International_Development
The United States Agency for International Development (USAID) is a de jure agency of the executive branch of the United States federal government. USAID was the world's largest foreign aid agency, but it received major cutbacks in 2025, with its remaining functions being transferred to the United States Department of ...
politics_government
12,840
143115
Astrophotography
https://en.wikipedia.org/wiki/Astrophotography
Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1839, but it was not until the late 19th century that advances in technology allowed for detail...
arts_entertainment
4,179
143284
Restoration comedy
https://en.wikipedia.org/wiki/Restoration_comedy
Restoration comedy is English comedy written and performed in the Restoration period of 1660–1710. Comedy of manners is used as a synonym for this.George Henry Nettleton, Arthur British dramatists from Dryden to Sheridan p. 149. After public stage performances were banned for 18 years by the Puritan regime, reopening o...
arts_entertainment
4,277
143533
Green fluorescent protein
https://en.wikipedia.org/wiki/Green_fluorescent_protein
The green fluorescent protein (GFP) is a protein that exhibits green fluorescence when exposed to light in the blue to ultraviolet range. The label GFP traditionally refers to the protein first isolated from the jellyfish Aequorea victoria and is sometimes called avGFP. However, GFPs have been found in other organisms...
chemistry
4,442
144732
Secession
https://en.wikipedia.org/wiki/Secession
Secession (from ) is a term and concept of the formal withdrawal of a group from a political entity. In international law, secession is understood as a process in which an integral part of a state's territory unilaterally withdraws without the consent of the original state. The process begins once a group proclaims a...
politics_government
8,687
145401
Mexican Revolution
https://en.wikipedia.org/wiki/Mexican_Revolution
The Mexican Revolution () was an extended sequence of armed regional conflicts in Mexico from 20 November 1910 to 1 December 1920. It has been called "the defining event of modern Mexican history".Joseph, Gilbert and Jürgen Buchenau (2013). Mexico's Once and Future Revolution. Durham: Duke University Press, 1 It saw th...
politics_government
23,935