Twin vs Cieszyn

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Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ('non-identical' or 'fraternal'), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell.

In contrast, a fetus that develops alone in the womb (the much more common case, in humans) is called a singleton, and the general term for one offspring of a multiple birth is a multiple. Unrelated look-alikes whose resemblance parallels that of twins are referred to as doppelgangers.

Source: Wikipedia

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Cieszyn (Polish: [ˈtɕɛʂɨn] (listen); Czech: Těšín [ˈcɛʃiːn] (listen); German: Teschen; Latin: Tessin) is a border town in southern Poland on the east bank of the Olza River, and the administrative seat of Cieszyn County, Silesian Voivodeship. The town has 34,513 inhabitants (as of 2019), and lies opposite Český Těšín in the Czech Republic's Karviná District, Moravian-Silesian Region.

Both towns belonged to the historical region of Austrian Silesia and formerly as one town composed the capital of the region of Cieszyn Silesia.

Source: Wikipedia