Culture of the United Kingdom battleship the "Bismarck" in May 1941. In 1952, "OXO" (or "Noughts and Crosses"), created by computer scientist Alexander S. Douglas, is regarded as a contender for the first video game. In "OXO", the computer player could play perfect games of tic-tac-toe against a human opponent. In the 1960s, John Shepherd-Barron invented the cash machine (ATM) and James Goodfellow invented Personal identification number (PIN) technology, and on 27 June 1967, the first cash machine was established outside a branch of Barclays Bank in Enfield, north London. Dolly the sheep, the first mammal successfully cloned from an adult somatic cell (by scientists
Mammal tooth Mammal tooth Teeth are common to most vertebrates, but mammalian teeth are distinctive in having a variety of shapes and functions. This feature first arose among the Therapsida (mammal-like reptiles) during the Permian, and has continued to the present day. All Therapsid groups with the exception of the mammals are now extinct, but each of these groups possessed different tooth patterns, which aids with the classification of fossils. The extant mammalian infraclasses each have a set dental formula; the Eutheria (placental mammals) commonly have three pairs of molars and four premolars per jaw, whereas the Metatheria (marsupials) generally have four