Since the mid-20th century, there has been considerable debate over how the earliest forms of life evolved and how to classify them, especially at the kingdom and domain levels and organisms that are or have been considered bacteria.

Since several elements are gases at commonly encountered temperatures, their densities are usually stated for their gaseous forms ; when liquefied or solidified, the gaseous elements have densities similar to those of the other elements.

Since capital goods and labor are highly heterogeneous ( i. e. they have different characteristics that pertain to physical productivity ), economic calculation requires a common basis for comparison for all forms of capital and labour.

Since the cuticula of these animals often forms an inelastic exoskeleton, it is shed during growth and a new, larger covering is formed.

Since then the bridges have been restored to their original forms using as many of the remaining materials as possible, but the buildings surrounding the Ponte Vecchio have been rebuilt in a style combining the old with modern design.

Since then, many other forms of reckoning boards or tables have been invented.

Since there is a lack of musical notation in early writings, the actual musical forms in the early church can only be surmised.

Since its inception it has broadened to find applications in many other areas, including statistical inference, natural language processing, cryptography, neurobiology, the evolution and function of molecular codes, model selection in ecology, thermal physics, quantum computing, plagiarism detection and other forms of data analysis.

Since that time, ADF has developed into one of the world's largest forms of contemporary Druidism practiced as a religion.

Since then, various life forms have been moved into three new kingdoms: Monera, for prokaryotes ( i. e., bacteria ); Protista, for protozoans and most algae ; and Fungi.

Since lexicalization may modify lexeme phonologically and morphologically it is possible, that a single etymological source may be borrowed in two or more forms into a single lexicon.

Since his debut in 1992, Muralitharan has taken 800 Test wickets and over 500 One Day International wickets, becoming the first player to take 1, 000 wickets combined in the two main forms of international cricket.

Since the late 1970s it has been revived in various forms of neo-psychedelia.

In an often quoted remark, Gould stated, " Since we proposed punctuated equilibria to explain trends, it is infuriating to be quoted again and again by creationists — whether through design or stupidity, I do not know — as admitting that the fossil record includes no transitional forms.

Since early in progressive rock's history, the term has been used to distinguish more classically influenced progressive rock from the more psychedelic and experimental forms of progressive rock.

Since the tube requires a vacuum to operate, convection cooling of the plate is not generally possible ( except in special applications where the anode forms a part of the vacuum envelope ; this is generally avoided due to the shock hazard from the anode voltage ).

Since 5 < sup > 2 </ sup > + 12 < sup > 2 </ sup > = 13 < sup > 2 </ sup >, ( 5, 12, 13 ) forms a Pythagorean triple.

Since 1991, most of the territory forms the core of Moldova, with smaller parts in Ukraine.

Since then the system has evolved to address the changing need to recognise other forms of service to the United Kingdom.

Since many components of natural foods have E numbers ( and the number simply is a synonym for the chemical component ), e. g. vitamin C ( E300 ) and lycopene ( E160d ), this is incorrect ; presumably the intent is that the ingredients list does not list any food additives by E number, that is, pure forms of the substances are not intentionally added.

Since diatoms form an important part of the food of molluscs, tunicates, and fishes, the alimentary tracts of these animals often yield forms that are not easily secured in other ways.

Since 2006, improvisational music in many forms has been supported and promoted by ISIM, the International Society for Improvised Music, founded by Ed Sarath of the University of Michigan and Sarah Weaver.

Since accessing slots via messages forms the majority of the syntax in Self, many messages are sent to " self ", and the " self " can be left off ( hence the name ).

Since no additions were allowed to be made to the official text of the Bible, the early Masoretes adopted other expedients: e. g., they marked the various divisions by spacing, and gave indications of halakic and haggadic teachings by full or defective spelling, abnormal forms of letters, dots, and other signs.

Since then, many other forms of lymphoma have been described, grouped under several proposed classifications.

Since the great flood of these dystopias has appeared only in the last twelve years, it seems fairly reasonable to assume that the chief impetus was the 1949 publication of Nineteen Eighty-Four, an assumption which is supported by the frequent echoes of such details as Room 101, along with education by conditioning from Brave New World, a book to which science-fiction writers may well have returned with new interest after reading the more powerful Orwell dystopia.

Since the obvious is not always true, the Republican National Committee wisely analyzed its defeat of last autumn and finds that it occurred, as suspected, in the larger cities.

Since appeals to morality, to humanity, and to sanity have had such small effect, perhaps our last recourse is the deterrent example.

Since 30 June 2012 when the last leap second was added, TAI has been exactly 35 seconds ahead of UTC.

Chaplin decided not to re-enter the United States, writing: " Since the end of the last world war, I have been the object of lies and propaganda by powerful reactionary groups who, by their influence and by the aid of America's yellow press, have created an unhealthy atmosphere in which liberal-minded individuals can be singled out and persecuted.

Since the last railway was dismantled in 1952, the only remaining modes of transport are by motorways, by sea, and by air.

Since the discovery of his " Letter to the Alexandrians " in the last century, much work has been done to rehabilitate Claudius and determine where the truth lies.

Since the last remainder is zero, the algorithm ends with 21 as the greatest common divisor of 1071 and 462.

Since family names are normally written last in European societies ( except in Hungary ), the term last name is commonly used for family name, while in East Asia ( with vertical writing ) the family name may be referred to as upper name ( as in Japanese ).

Since the formation of the first Fianna Fáil government on 9 March 1932, the party has been in power for 61 of the last 79 years.

Since Magneto was the last person on Genosha, it seems that it ’ s now totally uninhabited, which is corroborated by Wiccan and Speed when they began their search for their mother, the Scarlet Witch.

Since the end of Sakoku in 1853, the flow of loanwords from European languages has increased significantly – the last half-century or so has seen a very large volume of words borrowed from English, especially words about technology, including pasokon ( a shortening of " personal computer "), intānetto (" Internet "), and kamera (" camera ").

Since 1996, the restitutions, according sometimes to less formal criteria, concerned 47 more pieces ( 26 paintings, with 6 from the Louvre including a then displayed Tiepolo ), until the last claims of French owners and their heirs ended again in 2006.

Since the ice receded from the area last, the most rapid rebound still occurs there.

Since the new school year generally starts right after Labour Day, families with school-age children take it as the last chance to travel before the end of summer.

Since the last ice age sea level has risen as much as 400 feet (~ 120 meters ).

Since Maeshowe is the largest and most sophisticated example of the Maeshowe " type " of tomb, archaeologists have suggested that it is the last of its class, built around 2800 BC.

Since the papacy of Heraclas in the 3rd century, the Bishop of the Alexandria in both the Coptic Orthodox Church of Alexandria and the Greek Orthodox Church of Alexandria continue to be called " Pope ", the former being called " Coptic Pope " or, more properly, " Pope and Patriarch of All Africa on the Holy Orthodox and Apostolic Throne of Saint Mark the Evangelist and Holy Apostle " and the last called " Pope and Patriarch of Alexandria and All Africa ".

Since 2006, the Eagles have only worn the alternate black jerseys once a season and for the last November home game, but did not use them in 2007, 2010, and 2011.

Since Schrödinger's time, other interpretations of quantum mechanics have been proposed that give different answers to the questions posed by Schrödinger's cat of how long superpositions last and when ( or whether ) they collapse.

Since this war was considered among the ancient Greeks as either the last event of the mythical age or the first event of the historical age, several dates are given for the fall of Troy.

Since 1991 – the last year of existence of the USSR – up to 1993 – the last year of rouble zone existence – the rate of inflation was measured in tens, hundreds and even thousands per cent per year.

Since the last trick determines who collects the winning, the players need to rely on luck and strategies to save the strong hand to the last trick.