During the 1820s and 1830s, HBC trappers were deeply involved in the early exploration and development of Northern California.

During WWII and beyond, RCA set up several new divisions, for defense, space exploration and other activities.

During his time at the archives, Steiner wrote Die Philosophie der Freiheit ( The Philosophy of Freedom or The Philosophy of Spiritual Activity — Steiner's preferred English title ) ( 1894 ), an exploration of epistemology and ethics that suggested a path upon which humans can become spiritually free beings.

During exploration, there will be the potential for lunar / Martian dust to be retained on the spacesuit.

During early European and American exploration of the Great Plains, the region in which the Dust Bowl occurred was thought unsuitable for European-style agriculture ; the region was known as the Great American Desert.

During the 1990s, further exploration was stalled because of legal battles between the Triton partners.

During the course of this exploration, Holloway's resolve slowly deteriorates, until the house's bizarre architecture leads him to believe an image he sees down a hall is the " monster " stalking them when, in fact, he is actually looking at his own men ; he shoots one of them, and, upon realizing what he's done, suffers a complete psychological breakdown and tries to murder them.

During the first few days of exploration, they identified the site of Old Point Comfort ( which they originally named " Point Comfort ") as a strategic defensive location at the entrance to the body of water that became known as Hampton Roads.

: During the early period of exploration and development of ideas, premature conference presentations and individual seminars were given by various members of the Cambridge group in other archaeological departments in England and abroad.

During the early phase of the exploration of the northern part of the Philippines López de Legazpi had remained in Cebu, and had not accompanied his men during their colonization of Manila, because of health problems and advanced age.

During his exploration of northwest Europe ( c. 320 BC ), Pytheas of Massilia called the island Iérnē ( written ).

During the 1980s he was the host of a popular television program on space exploration entitled Man, Earth, Universe.

During the third exploration, which departed from the Mayflower on December 6, 1620, a group of men including Bradford located present day Plymouth Bay.

During his exploration, Colter became the first known European to visit what is now known as Yellowstone National Park ; he reported on what was named the eponymous Colter's Hell.

During the over 300 years of Brazilian colonial history, the economic exploration of the territory was based first on brazilwood extraction ( 16th century ), sugar production ( 16th – 18th centuries ), and finally on gold and diamond mining ( 18th century ).

During this brief period in jail he started working on his first novel, Ecué-Yamba-O, an exploration of Afro-Cuban traditions among the poor of the island.

During her exploration of Tallon IV, Samus finds the twelve keys to the Artifact Temple, and lores recorded by both the Chozo and the Space Pirates, providing some more insight about the history of the planet and the two races ' colonization of it and other activities.

During Frondizi's administration, in summary, foreign investment was most encouraged into the sectors creating most of the trade deficits chronic to the Argentine economy between 1949 and 1962 ; indeed, 90 % of all foreign investment during his term went into oil exploration, oil refineries, the auto industry, steel and household durables.

During this exploration, while making a reconnaissance of the higher reaches of the Dudh Khola, they clearly saw Manaslu from Bumtang.

During a sumptuous feast on the Isle of Love, Tethys, who is now the lover of da Gama, prophecies the future of Portuguese exploration and conquest.

During the 1970s and 1980s Israel began developing the infrastructure needed for research and development in space exploration and sciences.

During Roe's time in term in the Survey Office, he attempted to transcribe every journal of exploration in Western Australia.

During their exploration, the Martian starship is attacked by an unknown starship which causes its automated defence systems to come online.

During these years she wrote nothing on travel and exploration, but published a volume of miscellaneous essays, Perseus in the Wind ( 1948 ) and three volumes of autobiography, Traveller's Prelude ( 1950 ), Beyond Euphrates.

During the last week of march 1961, Columbus, Ohio was the site of the Fourth Symposium on Temperature, Its Measurement And Control In Science And Industry.

During the Acropolis excavations in Athens, which terminated in 1888, many potsherds of the Mycenaean style were found ; but Olympia had yielded either none, or such as had not been recognized before being thrown away, and the temple site at Delphi produced nothing distinctively Aegean ( in dating ).

During the period 1825 – 1863 a sheep market was held at a site in Castle Street, to stop the sale of sheep on the streets of the town.

During the American Civil War, it was the site of a prisoner-of-war camp which is now Andersonville National Historic Site.

During the Gulf War, the HARM was involved in a friendly fire incident when the pilot of an F-4G Wild Weasel escorting a B-52 bomber mistook the latter's tail gun radar for an Iraqi AAA site.

During the 1st century AD, the Army then chose a site to the north of the emerging town in what is now the section of Bonn-Castell to build a large military installation dubbed Castra Bonnensis, i. e., literally, " Fort Bonn ".

During the Second World War, Bletchley Park was the site of the United Kingdom's main decryption establishment, the Government Code and Cypher School ( GC & CS ), where ciphers and codes of several Axis countries were decrypted, most importantly the ciphers generated by the German Enigma and Lorenz machines.

During the late 1970s and early 1980s, the site hosted Creative Time's landmark Art on the Beach sculpture exhibitions.

During withdrawal, fluoroquinolone-based antibiotics are best avoided if possible ; they displace benzodiazepines from their binding site and reduce GABA function and, thus, may aggravate withdrawal symptoms.

During Thompson's 1811 voyage down the Columbia River he camped at the junction with the Snake River on July 9, 1811, and erected a pole and a notice claiming the country for Great Britain and stating the intention of the North West Company to build a trading post at the site.

During the Middle Ages, the Old Prussian settlement of Truso was located at Lake Drużno near the current site of Elbląg in historical Pogesania ; the settlement burned down in the 10th century.

During a tour of Germany in 1958, accompanied by then-wife Eden, daughter Melinda, Robert Dwan and Dwan's daughter Judith, he climbed a pile of rubble that marked the site of Adolf Hitler's bunker, the site of Hitler's death, and performed a two-minute Charleston.

During the four days of its exhibition, an estimated 60, 000 people visited the site.

During the second century AD, a storehouse was constructed on the site of the Pompeion, but it was destroyed during the invasion of the Heruli in 267 AD.

During the Early Middle Ages, Slavic Pomeranians founded a settlement at the site of modern Budzistowo.

During the Ostsiedlung, a settlement was founded by German settlers some kilometers off the site of the Slavic one, the official city website mentions that it was located within the boundary of today's downtown of Kołobrzeg and that certain part of inhabitants of the Polish town moved to the new settlement.

During the Invasion of Poland, Riefenstahl was photographed in Poland wearing a military uniform and a pistol on her belt in the company of German soldiers ; she had gone to the site of the battle as a war correspondent.

During the Second World War, the island was the site of the Battle of Madagascar between the Vichy government and the British.

During the development of nerve edema from nerve irritation or ( injury ), the amount of endoneurial fluid may increase at the site of irritation.

During World War II, the first atomic bombs were designed and manufactured at Los Alamos and the first was tested at Trinity site in the desert on the White Sands Proving Grounds between Socorro and Alamogordo.

During the building phase Potsdamer Platz was the largest building site in Europe.

During the last glacial period, present-day Slovenia was inhabited by Neanderthals ; the most famous Neanderthal archeological site in Slovenia is a cave close to the village of Šebrelje near Cerkno, where the Divje Babe flute, the oldest known musical instrument in the world was found in 1995.

During the next major phase of activity, 30 enormous Oligocene-Miocene sarsen stones ( shown grey on the plan ) were brought to the site.

During the recovery effort at the World Trade Center site, workers recovered and identified remains from Flight 175 victims ( see the Aftermath section below ), but many other body fragments could not be identified.