Rat Pack Rat Pack The Rat Pack is a term used by the media to refer to an informal group of entertainers centered on the Las Vegas casino scene. Having its origins in a group of friends that met at the Los Angeles home of Humphrey Bogart and Lauren Bacall, by the 1960s, it was the name used by the press and the general public to refer to a later variation of the group that called itself "the Summit" or "the Clan", featuring Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford and Joey Bishop among others; they appeared together on stage
Pack rat due to variation in reproduction and juvenile survival. Female annual survival rates vary by age from 0.42 for juveniles to 0.71 for 1–2 year olds, and very few females (less than 5%) live beyond 3 years of age. A pack rat midden is a debris pile constructed by a woodrat. A midden may preserve the materials incorporated into it for up to 50,000 years, thus may be analyzed to reconstruct their original environment, and comparisons between middens allow a record of vegetative and climate change to be built. Examinations and comparisons of pack rat middens have largely supplanted pollen records