Dentition mammals the infants have a set of teeth that fall out and are replaced by adult teeth. These are called deciduous teeth, primary teeth, baby teeth or milk teeth. Animals that have two sets of teeth, one followed by the other, are said to be diphyodont. Normally the dental formula for milk teeth is the same as for adult teeth except that the molars are missing. Because mammal teeth are specialised for different functions, many mammal groups have lost teeth not needed in their adaptation. Tooth form has also undergone evolutionary modification as a result of natural selection for specialised
I Should Have Known Better I Should Have Known Better "I Should Have Known Better" is a song by English rock band the Beatles composed by John Lennon (credited to Lennon–McCartney), and originally issued on "A Hard Day's Night", their soundtrack for the film of the same name released on 10 July 1964. "I Should Have Known Better" was also issued as the B-side of the US single "A Hard Day's Night" released on 13 July. An orchestrated version of the song conducted by George Martin appears on the North American version of the album, "A Hard Day's Night Original Motion Picture Soundtrack". In January