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30 April 2019
- 00:00, 30 April 2019 (UTC)

Aporometra wilsoni
29 April 2019
- 00:00, 29 April 2019 (UTC)

Ānanda (left) and the Buddha
28 April 2019
- 00:00, 28 April 2019 (UTC)

Villa by Andrea Palladio
27 April 2019
- 00:00, 27 April 2019 (UTC)

Illustration fromThe Fox's Frolic
26 April 2019
- 00:00, 26 April 2019 (UTC)

SARS coronavirus
25 April 2019
- 00:00, 25 April 2019 (UTC)

Alai Darwaza
- ... that the 14th-centuryAlai Darwaza(pictured) was the first Indian monument built using Islamic methods of construction and ornamentation?
- ... that while afederal deputy,Virgilio Caballero Pedraza lost his apartment in the2017 Mexico City earthquake?
- ... thatIndra Devi helped publiciseyoga for women by enrolling film stars and other celebrities as her pupils?
- ... thatNoelle Sandwith produced the first portrait of aQueen of Tonga?
- ... thatAvi Nissenkorn, former chairman ofHistadrut, Israel's largest trade union, competed in his youth in the1986 World Junior Championships in Athletics?
- ... that the yeastCandida blankii, first described frommink organs, is now known to infect humans?
- ... thatJens Harzer, a German actor with Hamburg'sThalia Theatre as well as in film and television, was chosen byBruno Ganz to be the latest bearer of theIffland-Ring?
- ... that beforeSt Wilfrid's Church opened, Catholics inHailsham, East Sussex, had to worship in the hayloft of a brewery's stables?
24 April 2019
- 00:00, 24 April 2019 (UTC)

Walter Stanley Haines
23 April 2019
- 00:00, 23 April 2019 (UTC)

Fabiana Rosales
22 April 2019
- 00:00, 22 April 2019 (UTC)
21 April 2019
- 00:00, 21 April 2019 (UTC)
- ... that in the 1970s,spoon worms(example pictured) helped promotebiodiversity around the effluent outlets from the Los Angelessewage system?
- ... that despite being demoted three times,Nikolai Kulakov rose to the rank ofvice admiral and became aHero of the Soviet Union?
- ... that the motetSicut cervus byPalestrina, suitable forHoly Saturday, has been described as the expression of "serene but fervent spiritual yearning"?
- ... that cinematographerMike Gioulakis was inspired by the photography ofGregory Crewdson when shooting the 2014 horror filmIt Follows?
- ... that duringCardiff City F.C.'s1921–22 season, trainerGeorge Latham became the oldest player in club history when called into action after members of the first team fell ill?
- ... thatShah Faesal, the first Kashmiri to top theIndian civil services exam, has become a politician?
- ... that in 1941, the far-rightFrench National-Collectivist Party proposed sending its women paramilitaries to fight forVichy France inSyria?
- ... thatNecdet Turhan, a visually impaired mountaineer and long-distance runner, ran five marathons and climbed five summits on five continents?
20 April 2019
- 00:00, 20 April 2019 (UTC)
[[File:|160px|A variant of Shepard's elephant illusion ]]
A variant of Shepard's elephant illusion
19 April 2019
- 00:00, 19 April 2019 (UTC)

Superbloom in California
18 April 2019
- 00:00, 18 April 2019 (UTC)

Fritz Pollard
- ... thatFritz Pollard(pictured) became theNFL'sfirst black quarterback in 1923, but it was not until 2017 that all 32 modern NFL teams had started at least one black quarterback?
- ... thatAll India Trinamool Congress MPUma Saren was the first person to speak in the tribalSantali language at theInter-Parliamentary Union?
- ... that the weevil speciesSicoderus bautistai, described as resembling "black, shiny ants", is named after professional baseball playerJosé Bautista?
- ... that Czech chemistKarel Wiesner, unable to study at university under the German occupation, set up a laboratory in the basement of his parents' house to teach himselfpolarography?
- ... that theNatal Border Guard, established in 1878, was expected to defend theColony of Natal armed only with spears and shields?
- ... that American artistLydia Purdy Hess, best known for herPortrait of Miss E. H., sketched and painted while floating on the Ohio River during her two-month honeymoon?
- ... that theTroy Museum, located close to the ancient city ofTroy, is clad in rust-coloredweathering steel to resemble an excavated artifact?
- ... that at theQueen Charlotte's Ball, debutantes curtsey to a giant birthday cake?
17 April 2019
- 00:00, 17 April 2019 (UTC)

Chatham shag
- ... that thescientific name of theChatham shag(pictured) commemoratesa former Governor of New Zealand?
- ... thatSatish Namdeo Ghormade has served as commanding officer of aguided missile frigate, asubmarine rescue vessel, and aminesweeper?
- ... that at the2019 Tour Championshipsnooker tournament the first-round match betweenNeil Robertson andMark Selby, played over 17frames, was decided by the finalblack?
- ... that, inspired at the age of five by herfootball-playing brother,Dilan Ağgül became a footballer in Germany and later played for theTurkey women's national team?
- ... that the tragic early life of thevisual-novel characterKiritsugu Emiya was written byGen Urobuchi as a prequel toFate/stay night, which has a happy ending?
- ... thatHeinz Hoppe performed as a lyric tenor at theHamburg State Opera, including world premieres, but became popular for operetta recordings and television shows?
- ... that more than one million people are buried onHart Island, thepotter's field for New York City?
- ... thatRam Singh Malam designed and decorated thePalace of Mirrors and its pleasure hall?
16 April 2019
- 00:00, 16 April 2019 (UTC)

Gloucester Court of Probate
- ... thatThomas Fulljames designed theGloucester Court of Probate(pictured) in a "picturesque Gothic" style?
- ... thatthe Spider-Man created for the2018 video game by Insomniac Games has been used by Marvel Comics as analternate version of Spider-Man?
- ... that volleyball playerChen Zhaodi, who was nicknamed "One-armed General" despite having two arms, became an actual general after retiring from her volleyball career?
- ... that theroyal vole haslarder chambers in its burrow but not latrines?
- ... that during WorldWar II, the crew of theUSS Argonaut donated their ship's bell to theSubmarine Memorial Chapel before the submarine was lost in combat?
- ... thatRuth H. Alexander was the first woman selected to serve on thePresident's Council on Sports, Fitness, and Nutrition?
- ... that three times a day, the clock tower across fromSouthampton'sWatts Park tolls outIsaac Watts's hymn "Our God, Our Help in Ages Past"?
- ... that whenHansgünther Heyme staged classic plays,Antigone was set in Calcutta,William Tell in Nazi Germany, andHamlet ended with the prince on a metal trolley?
15 April 2019
- 00:11, 15 April 2019 (UTC)

James Henry Marriott
14 April 2019
- 00:11, 14 April 2019 (UTC)

Agatha Christie'sThe A.B.C. Murders
13 April 2019
- 00:11, 13 April 2019 (UTC)

Leroy Daniels (left)with Fred Astaire
- ... that choreographerAlex Romero hired ashoeshiner, Leroy Daniels(pictured), to dance withFred Astaire in the 1953 filmThe Band Wagon?
- ... that indigenous resistance bymainland Caribs andIsland Caribs played a major role in the failure of Dutch, British, French, andCourlander attempts to coloniseTobago in the 17th century?
- ... thatPatrick Lange, who conducteda Stephen Sondheim musical in a youth club production at age 16, becamechief music director of theWiesbaden State Opera at age 36?
- ... that theHolby City production team worked withParkinson's UK to create aParkinson's disease storyline for the characterAlex Adams?
- ... that Indian social workerSharda Mehta organised a protest againstindentured servitude in 1917?
- ... that the formerMarysville Cotton Mill now houses adata centre for departments and agencies of theGovernment of New Brunswick?
- ... thatTsutomu Kawabuchi was referred to as the "father ofJapanese women's ice hockey"?
- ... that themottled piculet likes todrum on bamboo?
- ... thatBulgaria's first cosmonaut,Georgi Ivanov, safely returned to Earth despite a failing main engine and a damaged backup engine on hisSoyuz 33 spacecraft?
- ... thatMeghan Trainor requested the removal of her song "Me Too" fromVevo, due to unapproved digital manipulation of her body in the video?
12 April 2019
- 00:15, 12 April 2019 (UTC)

American Adolf Hitler propaganda stamp
- ... that the Germanphilatelic writerWolfgang Baldus is a specialist in the forged andpropaganda stamps of the Second World War, such as the American Adolf Hitler skull stamp(pictured)?
- ... that theIndian Creek mushroom can be distinguished fromchanterelles by its staining dark purple when cut or bruised?
- ... that the Dutch-Belgian composerOscar van Hemel created two operas, one of them about a prostitute?
- ... thatMawjoudin Queer Film Festival, the firstqueer film festival in North Africa, does not disclose its location due to security concerns?
- ... that journalistRoman Sushchenko was named by the European Parliament as one of 30 Ukrainian citizens illegally detained or imprisoned in Russia?
- ... that theJohn D. Dingell, Jr. Conservation, Management, and Recreation Act protected more than 1.3 million acres (5,300 km2) ofwilderness and created fourU.S. national monuments?
- ... thatMr Justice Orr granted the wife of British spyGeorge Blake adecree nisi for divorce on the grounds that a conviction fortreason can amount to cruelty?
- ... thatJohn Wozniak took less than an hour to writeMarcy Playground'sonly hit, "Sex and Candy", in his bedroom at 4 a.m.?
11 April 2019
- 04:23, 11 April 2019 (UTC)

Chinese alligator
10 April 2019
- 00:00, 10 April 2019 (UTC)

Pearl Doles Bell
9 April 2019
- 00:00, 9 April 2019 (UTC)

Pacu jawi
8 April 2019
- 00:00, 8 April 2019 (UTC)

Ansel Adams
- ... thatAnsel Adams(pictured), known for his black-and-white landscape photographs, documented aJapanese-American internment camp during WorldWar II?
- ... that theinner core may rotate slightly faster than the rest of the Earth due to torque caused by Earth'sgeodynamo and the solidification of the core?
- ... that fees and penalties charged as part ofcriminal-justice financial obligations in the United States may lead to the justice system becoming both a result and a cause ofpoverty?
- ... that in a telegram toHitler,Hans Bredow, the former head of theReich Broadcasting Corporation, requested to be treated like his colleagues who were interned in theOranienburg concentration camp?
- ... that thepolychaete wormPoecilochaetus serpens digs a burrow with its head and lines it with particles of clay or mud cemented with mucus?
- ... that medieval historianMaria Teresa Ferrer i Mallol believed that the 14th-centuryMudéjar Muslim, Jewish, and Christian communities inCatalonia andValencia co-existed due toreligious segregation?
- ... that some newspapers reported as many as 3,000 deaths inKey West, Florida, duringan October 1909 hurricane, but just two fatalities occurred in the city in actuality?
- ... thata British Guiana one-cent postage stamp thatNeil Ross McKinnon bought from a schoolboy later sold for US$9.5 million?
7 April 2019
- 00:00, 7 April 2019 (UTC)

Nazir Wani's wife (right) receives the Ashoka Chakra on his behalf from thePresident of India.
6 April 2019
- 00:00, 6 April 2019 (UTC)

Judah Samet
5 April 2019
- 00:50, 5 April 2019 (UTC)

Charles Stewart Mott Foundation Building
- ... that theCharles Stewart Mott Foundation Building(pictured) inFlint, Michigan, made its film debut in the 2008 sports comedySemi-Pro?
- ... thatzinc oxide nanoparticles, thought to be one of the most-producednanomaterials, are commonly used in sunscreens?
- ... that Dutch pool playerAlex Lely won the 1999World Pool Masters Tournament and collected autographs from his opponents?
- ... that the means of raising the late 18th-century BritishProvisional Cavalry was likened to the medieval-erafeudal system?
- ... that, at age 60,Carrie Langston Hughes made herBroadway debut as Sister Susie May Hunt inHall Johnson'sRun Little Chillun?
- ... thatCoccothrinax jimenezii, a palm tree native to the island ofHispaniola, was listed as acritically endangered species within two years of itsformal description?
- ... thatHorst Laubenthal appeared in Mozart operas at theGlyndebourne Festival asBelmonte, in Paris asTamino, and in Turin asOttavio?
- ... thatMoston Brook was one of the most polluted waterways inGreater Manchester but, following improvements, it is now a recreational resource for local residents?
4 April 2019
- 00:00, 4 April 2019 (UTC)

Memorial to Dortan victims
3 April 2019
- 00:00, 3 April 2019 (UTC)

Queen Elizabeth 2
2 April 2019
- 00:00, 2 April 2019 (UTC)

A squirrel
1 April 2019
- 12:00, 1 April 2019 (UTC)

The pedestal
- 00:00, 1 April 2019 (UTC)

Linda Sarsour