At some point an unknown reaction called baryogenesis violated the conservation of baryon number, leading to a very small excess of quarks and leptons over antiquarks and antileptons — of the order of one part in 30 million.

At what point during the war Teach joined the fighting is, in keeping with the record of most of his life before he became a pirate, unknown.

At that time the Western Hemisphere in general was unknown to Europeans.

At a meeting of the Royal Astronomical Society in Britain, a team from University of Queensland described 40 unknown " dwarf " galaxies in this constellation ; follow-up observations with the Hubble Space Telescope and the European Southern Observatory's Very Large Telescope revealed that ultra compact dwarfs are much smaller than previously known dwarf galaxies, about across.

At the end of one of his shafts, Dixon discovered a ball of black diorite and a bronze implement of unknown purpose.

At first reluctantly, but then with increasing vigour, Galen promoted Hippocratic teaching, including venesection and bloodletting, then unknown in Rome.

" At funerals for the unknown soldier, rabbis stood alongside the other chaplains and recited prayers in Hebrew.

At each point in time, the agent performs an action and the environment generates an observation and an instantaneous cost, according to some ( usually unknown ) dynamics.

The X in the name represents an unknown and is pronounced as the letter, as opposed to the Roman numeral for 10 ( At the time, Planet X would have been the ninth planet ).

At present, the precise molecular genetics and biochemistry of the melanism in this species remains unknown.

At this time, there were some suggestions that quasars were made of some hitherto unknown form of stable antimatter and that this might account for their brightness.

* At low energies, the logic of the renormalization group tells us that, despite the unknown choices of these infinitely many parameters, quantum gravity will reduce to the usual Einstein theory of general relativity.

At the show trial, six of the defendants were given the death sentence ; for unknown reasons the sentences were not carried out.

Note that the southern tip of Lake Michigan is depicted as being farther north than Lake Erie. At the time, the actual location of this extreme was unknown.

At the end of 985, probably at the instigation of Boleslav II the Pious, Bolesław I married an unknown Hungarian princess with whom he had a son, Bezprym.

At first it was hypothesized that the line might be due to an unknown element, which was named nebulium — a similar idea had led to the discovery of helium through analysis of the Sun's spectrum in 1868.

At the end of his reign, Connacht vanished into the unknown eastern lands.

At some point Pelagius is said to have rebelled, but for what reasons is unknown and such rebellions by local authorities against their superiors formed a common theme in Visigothic Spain.

At his home, Morbius explains that an unknown " planetary force " killed nearly everyone else and then vaporized their starship as the survivors tried to leave the planet.

At a later time the Communist authorities removed the zinc coffin from Vrana and moved it to a secret location, which remains unknown to this day.

At this time, the city was renamed " Heraklion ", after the Roman port of Heracleum (" Heracles ' city "), whose exact location is unknown.

At the track, Dink happens across a woman who, unknown to either of them, is actually his mother Linda.

At the present time, aircraft are not designed to withstand such strikes, since their existence was unknown at the time standards were set, and the dangers unappreciated until the destruction of a glider in 1999.

At this period he played an active role controlling the expulsion of Germans .< ref >< sub >( hu )</ sub > Imre Nagy's unknown life, in Magyar Narancs

At that time, Wensleydale was almost always blue with the white variety almost unknown.

) At this late date, it is impossible for St. Michael's College to find a suitable replacement for me.

At this date, it seems probable that the name of Serge Prokofieff will appear in the archives of History, as an effective Traditionalist, who was fully aware of the lure and danger of experimentation, and used it as it served his purpose ; ;

At the beginning of the 5th century it seems to have been an entrepôt of the Pontic grain trade, which, at a later date, became an Athenian monopoly.

At the beginning stands the usual introductory matter, such as the tables for determining the date of Easter, the calendar, and the general rubrics.

At 68 minutes, it was his longest picture to date.

At the First Council of Nicaea in 325 it was decided that all Christian churches would celebrate Easter on the same day, which would be computed independently of any Jewish calculations to determine the date of Passover.

At that date it is quite easy to find American films such as Stella Maris in which only fades are used.

At least one important reference work identifies the latter as a film noir despite its early date.

At an earlier date the name possessed a wider signification and was applied to a considerable portion of the adjoining district.

At this date, there is no indication that the rifle will be adopted by the United States Armed Forces.

* Implemented: At the appointed date and time, the changes must be implemented.

At a later date his remains were transferred to Rome.

At that late date the ancient authors were attempting to explain the provenance of the name.

At his first Cabinet meeting, Askin restored direct air services between Sydney and Dubbo, and required Joern Utzon, the Danish architect then working on the Sydney Opera House, to provide a final price and completion date for the Opera House, which had gone past the original estimates for both.

At a certain date, no more changes should be allowed to the system and the code should be frozen.

At 9 pm on November 7, 1919, a date chosen because it was the second anniversary of the Bolshevik revolution, agents of the Bureau of Investigation, together with local police, executed a series of well-publicized and violent raids against the Russian Workers in 12 cities.

At a conventional date of 1350 BC the fortifications on the acropolis, and other surrounding hills, were rebuilt in a style known as cyclopean because the blocks of stone used were so massive that they were thought in later ages to be the work of the one-eyed giants known as the cyclopes ( singular: Cyclops ).

At the end of the republic, however, or at latest at the beginning of the imperial period, the city of Circei was no longer at the east end of the promontory, but on the east shores of the Lago di Paola ( a lagoon — now a considerable fishery — separated from the sea by a line of sandhills and connected with it by a channel of Roman date: Strabo speaks of it as a small harbor ) north of the west end of the promontory.

At a date no doubt previous to the foundation of Syracuse, Corfu was peopled by settlers from Corinth, probably 730 BC, but it appears to have previously received a stream of emigrants from Eretria.

At the time of his birth, the king was his cousin Richard II, and Henry was not in the direct line to succeed to the throne, so Henry of Monmouth's date of birth was not officially documented.

At a later date, the same character unintentionally attempts to recruit members of his staff into selling calling cards, not realizing that he had been conned into a pyramid scheme until it is made clear by an employee.

At an uncertain date, Photios participated in an embassy to the Abbasids of Baghdad.

At this date Gregory had been bishop of Tours for two years.

At the date of his death, Pertwee was regularly being seen at the tail end of an enigmatic UK TV commercial for mobile phone operator Vodafone: dressed somewhat in his flamboyant ' Doctor ' manner, his character walked wordlessly across an alleyway in sight of a Liverpool landmark, and entered a garage evidently containing some kind of ' time machine '.

At some later date, he confronted Pelagius and his now greatly augmented force, near the modern town of Proaza.