Significant trade with neighbouring countries, for example, exports of camels and other livestock to neighbouring states, such as Libya, and imports of manufactured goods, are conducted " informally " and probably not fully recorded.

Significant excavation has since been conducted at the site of the city, which was designated a UNESCO World Heritage Site in 1980.

Significant surveys were conducted throughout the 1830s – 1850s.

Significant research on structure was conducted in the early 1960s by Alex Rich and Don Caspar, two researchers in Boston, the Jacques Fresco group in Princeton University and a United Kingdom group at King's College London.

Significant research has been conducted on the genes responsible for controlling circadian rhythm, particularly within the SCN.

Significant changes came in 1910 with the reform of the Roman Breviary by Pope Pius X.

Significant elements of English common law prior to 1776 still remain in effect in many jurisdictions in the United States, because they have never been rejected by American courts or legislatures.

Significant stands of trees have been destroyed by the ravages of the war.

Significant results were produced by Croatian mathematician Danilo Blanuša, who discovered two snarks in the 1940s, now known as Blanuša snarks ; prior to Blanuša's discovery, the only known snark was the Petersen graph ( Weisstein ).

Significant post-retirement activities of earlier Governors-General have included: Lord Tennyson was appointed Deputy Governor of the Isle of Wight ; Sir Ronald Munro Ferguson ( by now Lord Novar ) became Secretary of State for Scotland ; and Lord Gowrie became Chairman of the Marylebone Cricket Club ( Lord Forster had also held this post, before his appointment as Governor-General ).

Significant individual contributions to the war effort by Scots included the invention of radar by Robert Watson-Watt, which was invaluable in the Battle of Britain, as was the leadership at RAF Fighter Command of Air Chief Marshal Hugh Dowding.

Significant contributions to noise pollution are made by internal combustion engines.

Significant deposits of oil and gas are suspected by geologists to lie below Jan Mayen's surrounding seafloors.

Significant interpretations of his writings were produced by such sociological luminaries as Talcott Parsons and C. Wright Mills.

Significant modernist literary works continued to be created in the 1920s and 1930s, including further novels by Marcel Proust, Virginia Woolf, Robert Musil, and Dorothy Richardson.

Significant fluxes of heat, matter, or momentum on time scales of less than a day are advected by turbulent motions .< ref > Garratt, J. R., < u > The atmospheric boundary layer </ u >, Cambridge University Press, 1992 ; ISBN 0-521-38052-9 .</ ref > Boundary layer meteorology includes the study of all types of surface – atmosphere boundary, including ocean, lake, urban land and non-urban land for the study of meteorology.

Significant cave art sites off the coast of western Europe such as the Grotto Cosquer can be reached only by diving, because the cave entrances are underwater, though the upper portions of the caves themselves are not flooded.

Significant contributions to oceanographic knowledge were made by the voyages of HMS Beagle in the 1830s, with Charles Darwin aboard ; HMS Challenger during the 1870s ; the USS Tuscarora ( 1873 – 76 ); and the German Gazelle ( 1874 – 76 ).

Significant events in the early development of rugby football were the production of the first set of written football laws at Rugby School in 1845, which was followed by the ' Cambridge Rules ' drawn up in 1848.

Significant quantities are grown in some tropical countries, and these are shipped by air to markets across the world.

Significant deposits of elemental sulfur, believed to have been ( and are still being ) synthesised by anaerobic bacteria on sulfate minerals like gypsum, exist in salt domes along the coast of the Gulf of Mexico, and in evaporites in eastern Europe and western Asia.

These " Bloomsbury assumptions " are also reflected in members ' criticisms of materialistic realism in painting and fiction, influenced above all by Clive Bell's " concept of ' Significant Form ', which separated and elevated the concept of form above content in works of art ": it has been suggested that, with their " focus on form ... Bell's ideas have come to stand in for, perhaps too much so, the aesthetic principles of the Bloomsbury Group ".

* Significant emotional pain caused by an event ( rather than a mental disorder ) can cause an individual to temporarily lose all interest in food

Of the " Significant Seven " chosen by The Comic Book in America: An Illustrated History ( 1989 ), Marvel owns Spider-Man and Captain America and DC owns Superman, Batman, Wonder Woman, Captain Marvel and Plastic Man.

Significant changes occurred in the economy of the Tennessee Valley and the nation, prompted by an international oil embargo in 1973 and accelerating fuel costs later in the decade.

Significant numbers of British Churchill and Matilda tanks along with US M3 Lee were shipped to the USSR after becoming obsolete on the African Front with the Churchills supplied by the arctic convoys seeing action around Leningrad while tanks shipped by the Persian route supplied the Caucasian Front.

Significant fur trapping has continued in the region, but in general the east coast or East Main of James Bay was too easily accessed by French and independent traders from the south so early Hudson's Bay Company emphasis was quickly placed onto interior trapping grounds reached from the west coasts of James and Hudson Bays.

Significant problems with the metric of this form stem from the fact that all known warp drive spacetimes violate various energy conditions.

Significant weather forecasting problems that occur in the 0-to 12-hr range include severe weather in all seasons ( for example, tornadoes, thunderstorms, snow, and ice storms ) and hazards to aviation ( for example, clear air turbulence, icing, and downbursts ).

Significant amounts of precipitation occur in all seasons in most areas.

Significant quantities of gold were discovered in Johannesburg in 1886, setting off another mass migration as speculators, prospectors, fortune-seekers, and adventurers from all over the world descended upon the region.

Significant cards included Yoda, another new version of Luke ( Son of Skywalker ) and all of the bounty hunters, their ships, and weapons ( except Boba Fett ).

Significant contributions are credited in the AUTHORS file included in the distribution, and all remaining ones are documented in the changelogs, also included with the program.

Significant percentages of all major ethnic groups reside in San Gabriel Valley communities, and the area is in general one of the most ethnically diverse regions in the country.

Significant expansions are also common on all terrace homes ; roofs and additional rooms may be added within the floorspace of the house's lot.

Significant contributions have been made in many branches, most of all in the physics department.

Significant artists on this record label included the powerful contralto Inez Andrews ( formerly of The Caravans ), The Gospelettes with Liz Dargan ( formerly of Andrews ’ group The Andrewettes ), mixed vocal group The Kansas City Melodyaires ( later known as Mildred Clark & The Melodyaires ), The Jackson Southernaires and their younger siblings The Williams Brothers, Reverend Oris Mays and the Christian Harmonizers, all of whom with the exception of, Christian Harmonizers, continued with the label into the 1970s.

Significant increases in both military and domestic expenditure, combined with tax cuts and a recession, all contributed to record budget deficits recorded during the Bush administration.

Significant advances in the fields of liver medicine ( hepatology ) and transplantation ; renal disease and dialysis ; haematology and haemophilia have been made at the Royal Free and the trust now treats all patients needing dialysis in north and central London.

* Significant topics with no index entries at all

Significant antenna side-lobes extend in all directions unless the antenna is larger than the vehicle on which the radar is mounted.

The city government of San Francisco mandated the development of management plans for all the " natural areas " under the city's control, and this process culminated in release of the Significant Natural Resources Areas Management Plan in February 2006.

Significant provisions included expanding the suffrage to all male citizens over the age of 21, which included freedmen ; establishing a state public school system for the first time, with mandatory funding and attendance ; and providing for judges to be elected by the General Assembly rather than by popular vote.

Significant events adverse to Coalition Forces, such as the Haditha Trials, the loss of 6 Marine Snipers, and the widely reported destruction of a Marine vehicle carrying over a dozen men were all squarely placed in the public eye.

Significant demographic shifts in the island population began in 1962 when the French financed, Mauritian Company, Societe Huiliere de Diego et Peros, which had consolidated ownership of all the plantations in the Chagos in 1883, sold the plantations to the Seychelles Company, Chagos-Agalega Company, which then owned the entire Chagos Archipelago, except for six acres at the mouth of the Diego Garcia lagoon.

Significant damage to the station occurred in the Second World War, and the modern façade of the railway station ( the only modern building in all of Budapest's major rail terminals ) was eventually completed in 1975.

Significant envenomations ( as with all snakebites, the quantity of venom injected is highly variable and unpredictable ) can produce vision abnormalities and difficulty swallowing and speaking.