About 30 countries maintain about seventy research stations ( 40 year-round or permanent, and 30 summer-only ) in Antarctica, with an approximate population of 4000 in summer and 1000 in winter.

About 26 were sold to Siam and saw action as Infantry support guns and AA guns during the Franco-Thai war ( 1940-1941 ) along with 30 Vickers Mk. E Type B 6-ton tanks.

About 30, 000 left the country, and tens of thousands of people were detained and tortured, as investigated by the 2004 Valech Commission.

About 30 tonnes of gunpowder were stored in barrels in a magazine in a former Clarissen convent in the Doelenkwartier district.

About 50 % of Grenada's population is under the age of 30.

About 70 – 80 % of the mass in a cluster is in the form of dark matter, with 10 – 30 % consisting of this heated gas and the remaining few percent of the matter in the form of galaxies.

About 30 weekends a year, he went out on his boat.

About 30 % of the population of the island is concentrated in Saint Helier.

About two-thirds of the total population is under age 30, 36 % of whom are under 14.

About 1700 of them died and 30 Nepalese soldiers were lost in that battle.

About 30 percent of the Paraneña region is flooded from time to time, creating extensive areas of seasonal marshlands.

About 4 % of people will have an unprovoked seizure by the age of 80 and the chance of experiencing a second seizure is between 30 % and 50 %.

About 30, 000 refugees, mainly Malaitans, had to leave their homes, and economic activity on Guadalcanal was severely disrupted.

About 30 fishing vessels used by Norwegian refugees were gathered and the Shetland Bus conducted covert operations, carrying intelligence agents, refugees, instructors for the resistance, and military supplies.

About 7: 30 p. m., a group of approximately 30 black men, armed with rifles and shotguns, decided to go to the courthouse and support the sheriff and his deputies to defend Rowland from the mob.

About 30, 000 live in the capital, Port Vila.

About 30 percent of people are sensitive to biogenic amines, such as histamines.

* February 19 – WWII – Battle of Iwo Jima: About 30, 000 United States Marines land on Iwo Jima.

About 20 – 30 % of the discharge current is an electron current, which does not produce thrust, which limits the energetic efficiency of the thruster ; the other 70 – 80 % of the current is in the ions.

About 3: 30 in the afternoon on April 21, after burning Vince's Bridge, the Texans surged forward, catching the Mexican army by surprise.

About 70 %– 80 % of crayfish produced in Louisiana are Procambarus clarkii ( red swamp crawfish ), with the remaining 20 %– 30 % being Procambarus zonangulus ( white river crawfish ).

Doctors of Deception: What They Don't Want You to Know About Shock Treatment reports before-and-after IQ testing of persons receiving ECT, including the author, that show 30 to 40 point losses.

About a thousand years after that, when the Roman Empire was divided, it became capital of the Eastern section.

About a quarter of Hardy's poems carry an appended date line, usually the year of completion, but sometimes inclusive years ( `` 1908 - 1910 '' ) or two separate dates when Hardy worked on the poem ( `` 1905 and 1926 '' ) or an approximate date ( `` During the War '' ).

About five years ago, Handley came to ask me if he could see the tattered register.

About 15 % of the population is foreign, most of them immigrants from Argentina, Ecuador, and Colombia who have arrived in the previous 10 years.

* Unit cost: About $ 477, 000, but this varied greatly, especially as the years went by

About 4, 000 years ago, migrating Native Americans settled in the fertile valleys and coastal areas of what is present day Chile.

About 15 % of patients survive two or more years.

About seven million years old, an age that makes it one of the youngest open clusters in the Milky Way, it appears to have the shape of a letter A.

About two years after Cyril of Alexandria's death in 444, an aged monk from Constantinople named Eutyches began teaching a subtle variation on the traditional Christology in an attempt ( as he described in a letter to Pope Leo I in 448 ) to stop a new outbreak of Nestorianism.

About 75, 000 years ago, this Indonesian volcano released about 2, 800 </ sup > km < sup > 3 </ sup > DRE of ejecta, the largest known eruption within the Quaternary Period ( last 1. 8 million years ) and the largest known explosive eruption within the last 25 million years.

About half of the world's original forests had been destroyed by 2011, the majority during the previous 50 years.

About 20 years later, John Ambrose Fleming ( scientific adviser to the Marconi Company

About 10 years back the International Development Agency, the European Union and Japan.

About 1. 5 million immigrants had been processed at the first building during its five years of use.

About 1749, the family bought a house in the city of Zaragoza and some years later moved into it.

About 2 million years ago Grenada was formed as an underwater volcano.

About 300, 000 years after this event, atoms of hydrogen and helium began to form, in an event called recombination.

About 25 years after Herodotus, Thucydides, perhaps the most important of historians, pioneered a different form of history, one much closer to reportage.

About 90 million years ago, during the late Cretaceous Period, the Indian Plate began moving north at about 15 cm / year ( 6 in / yr ).

About 50 to 55 million years ago, in the Eocene Epoch of the Cenozoic Era, the plate collided with Asia after covering a distance of, having moved faster than any other known plate.

About eight to 12 annual changing exhibitions and permanent collection exhibitions provide educational opportunities for all ages, from learning the history of a quilt hand-stitched over 100 years ago to discovering how scientists analyze the physical properties of artists ' materials, such as glass or stone.

About ten years later, the employment of children and women in mining was forbidden.