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 classification and the new McKenna/Bell classifications of mammals. Extinct groups are represented by †. Several important fossil mammal discoveries have been made that have led researchers to question many of the relationships proposed by McKenna and Bell (1997). Additionally, researchers are subjecting taxonomic hypotheses to more rigorous cladistic analyses of early mammal fossils. Luo et al. (2002) summarized existing ideas and proposed new ideas of relationships among mammals at the most basal level. They argued that the term mammal should be defined based on characters (especially the dentary-squamosal jaw articulation) instead of a crown-based definition (the group that contains most recent