Conceptually similarSCIENCE SOURCETwin Sisters, 1855SS2714071JC7776SCIENCE SOURCETwin Sisters, 1857SS2714072JC7777SCIENCE SOURCETwin Sisters, 1854SS2714073JC7778SCIENCE SOURCETwin Sisters, 1868SS2714077JC7782SCIENCE SOURCETwins, The Grosvenor Brothers, 1894SS2714079JC7784SCIENCE SOURCETwins, The Smiley Brothers, 1895SS2714080JC7785SCIENCE SOURCETwins, Misick Sisters, 1872SS2714076JC7781SCIENCE SOURCETwin Sisters, 1907SS2714074JC7779SCIENCE SOURCEThe Twin FoxesSS2870063JG9539View AllView more with similar tones Twins, Minnie and Lena, 1890License type:Rights ManagedUnique identifier:SS2714078Legacy Identifier:JC7783Description:Twins are two offspring produced by the same pregnancy. Twins can either be monozygotic (identical), meaning that they can develop from just one zygote that will then split and form two embryos, or dizygotic (fraternal), meaning that they can develop from two different eggs, each are fertilized by separate sperm cells. Monozygotic twins are genetically nearly identical and they are always the same sex unless there has been a mutation during development. Identical twins do not have the same fingerprints, due to the fact that even in a small space inside the womb, people have contact with different parts of this environment, which gives small variations in the same digital, making them unique. No photographer credited, 1890.Credit:NYPL/Science SourceSize:2948px × 4500px (~37 MB)Get PricingHow Will The Visual Be Used?ShareKeywords:1890-1890s-19th century-bw-children-europe-france-french-history-identical twins-maternal twins-monozygotic twins-multiple birth-paternal twins-photo-siblings-sisters-twin siblings-twin sisters-twinsModel release:N/AParent folder:18809