Image 2The number π (/paɪ/ ⓘ; spelled out as pi) is a mathematical constant, approximately equal to 3.14159, t… en.wikipedia.org Visit source

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Image 1Logic studies valid forms of inference like modus ponens.Logic is the study of correct reasoning. It in… en.wikipedia.org Visit source

Black-and-white photograph of woman gazing into hand mirror en.wikipedia.org Visit source

A photograph of Catherine wearing a pale yellow coat dress and a fascinator of the same colour, holding Prince… en.wikipedia.org Visit source

A photograph of Catherine wearing a pale pink coat dress and a fascinator of the same colour. en.wikipedia.org Visit source

A photograph of a young woman with long brown hair. She is wearing a tiara and a blue sash over a gold-colored… en.wikipedia.org Visit source

Image 18Ziegler Polar ExpeditionPhoto credit: Anthony FialaA panorama from the Ziegler Polar Expedition of 190… en.wikipedia.org Visit source

Image 17ShivaPhoto: Los Angeles County Museum of ArtA Chola dynasty sculpture depicting Shiva. In Hinduism, Sh… en.wikipedia.org Visit source

Image 15Edward GibbonPainting: Henry WaltonEdward Gibbon (1737–1794) was an English historian who published Th… en.wikipedia.org Visit source

Image 14Slavery in the United StatesPhoto credit: McPherson and OliverScars of a whipped slave named Peter, ph… en.wikipedia.org Visit source

Image 13SamuraiPhotograph: Felice BeatoA samurai with his sword and armor, photographed by Felice Beato c. 186… en.wikipedia.org Visit source

Image 12Arg-e BamPhotograph credit: Diego DelsoThe Arg-e Bam, in Kerman Province in southeastern Iran, is the… en.wikipedia.org Visit source

Image 11Operation IvyPhoto: United States Department of EnergyThe mushroom cloud from the Ivy Mike nuclear tes… en.wikipedia.org Visit source

Image 8MasadaPhotograph: Andrew ShivaAn aerial view of Masada, an ancient fortification in the Southern Distri… en.wikipedia.org Visit source

Image 7Invasion of NormandyPhoto credit: United States Coast GuardLanding ships putting ashore on Omaha Beach… en.wikipedia.org Visit source

Image 6Machu PicchuPhoto: Martin St-AmantMachu Picchu, a 15th-century Peruvian Inca site located 2,430 metres… en.wikipedia.org Visit source

Image 5Warsaw Ghetto UprisingPhoto credit: USHMMJews captured by SS and SD troops during the suppression of th… en.wikipedia.org Visit source

Image 21906 San Francisco earthquakePhoto credit: H. D. ChadwickThe Mission District of San Francisco, Califor… en.wikipedia.org Visit source

Image 1Siege of Sevastopol (1854–1855)Artist: William Simpson; Restoration: Lise BroerA lithograph of a waterc… en.wikipedia.org Visit source

Image 15 AHS Centaur following her conversion to a hospital ship. The Red Cross designation "47" can be seen o… en.wikipedia.org Visit source

Image 14 Doctor Pierre-François Percy's original paper on Tarrare's medical history, Mémoire sur la polyphagie… en.wikipedia.org Visit source

Image 10 John S. MarmadukeOn September 6, 1863, near Little Rock, Arkansas, a duel was fought between John S.… en.wikipedia.org Visit source

Image 9 1764 map showing western part of the island of Montreal (Isle de Mont Real), with the growing town cen… en.wikipedia.org Visit source

Image 8The 250t class were high-seas torpedo boats built for the Austro-Hungarian Navy between 1913 and 1916.… en.wikipedia.org Visit source

Image 7 Captain James Newland c.1918James Ernest Newland, VC (22 August 1881 – 19 March 1949) was an Australia… en.wikipedia.org Visit source

Image 6 Jin dynasty (blue) and Song dynasty (orange) in 1141The Jin–Song Wars were a series of conflicts betwe… en.wikipedia.org Visit source

Image 4 Formal portrait, c. 1942Field Marshal Sir Thomas Albert Blamey (24 January 1884 – 27 May 1951) was an… en.wikipedia.org Visit source

Image 3 SMS GoebenSMS Goeben was the second of two Moltke-class battlecruisers of the Imperial German Navy, la… en.wikipedia.org Visit source

Image 2 Dubrovnik (left) and Beograd (right) photographed in the Bay of Kotor in 1941 after being captured by… en.wikipedia.org Visit source