Query: Temperatures cooled from about 1940 to 1975, and then they rose from about ’75 to about 2005 or so, and since then they’ve been flat or cooling.

Relevant passages:
Temperatures Rising <=SEP=> Temperatures Rising is an American television sitcom that aired on the ABC network from September 12 , 1972 to August 29 , 1974 . During its 46-episode run , it was presented in three different formats and cast line-ups . The series was developed for the network by William Asher and Harry Ackerman for Ashmont Productions and Screen Gems . Set in a fictional Washington , D.C. hospital , the series featured James Whitmore as a no-nonsense chief of staff , forced to deal with the outlandish antics of a young intern ( Cleavon Little ) and three nurses ( Joan Van Ark , Reva Rose , and Nancy Fox ) .   For the first season , 26 episodes were produced and broadcast . In the second season , Whitmore was replaced in the lead role by comedian Paul Lynde , and Asher was replaced as producer by Duke Vincent and Bruce Johnson . The series was re-titled The New Temperatures Rising Show , and featured a new supporting cast : Sudie Bond , Barbara Cason , Jennifer Darling , Jeff Morrow , and John Dehner . Cleavon Little was the only returning member of the original cast . In this season , Lynde was presented as the penny-pinching chief of staff , with Bond as his nagging mother and owner of the hospital .   The New Temperatures Rising Show ran for 13 episodes before being placed on hiatus in January 1974 due to poor ratings . It returned in July in yet another incarnation . Asher returned as producer and restored the series to its original format -- albeit with Lynde continuing in the lead . Reverting to the original title of Temperatures Rising , Little remained in the show 's cast , accompanied by a new line-up of supporting players : Alice Ghostley , Barbara Rucker and , returning from the first season 's cast , Nancy Fox . Offered as a summer replacement on Thursday nights , the third version of the sitcom ran for seven episodes , after which it was cancelled permanently .

Temperature <=SEP=> A temperature is an objective comparative measurement of hot or cold . It is measured by a thermometer . Several scales and units exist for measuring temperature , the most common being Celsius ( denoted ° C ; formerly called centigrade ) , Fahrenheit ( denoted ° F ) , and , especially in science , Kelvin ( denoted K ) .   The coldest theoretical temperature is absolute zero , at which the thermal motion of atoms and molecules reaches its minimum -- classically , this would be a state of motionlessness , but quantum uncertainty dictates that the particles still possess a finite zero-point energy . Absolute zero is denoted as 0 K on the Kelvin scale , − 273.15 ° C on the Celsius scale , and − 459.67 ° F on the Fahrenheit scale .   The kinetic theory offers a valuable but limited account of the behavior of the materials of macroscopic bodies , especially of fluids . It indicates the absolute temperature as proportional to the average kinetic energy of the random microscopic motions of those of their constituent microscopic particles , such as electrons , atoms , and molecules , that move freely within the material .   Temperature is important in all fields of natural science including physics , geology , chemistry , atmospheric sciences , medicine and biology as well as most aspects of daily life .