Answer the question at the end by quoting:

Carl Wilhelm Scheele (German: [kaal 'vIlhelm 'Se:l@], Swedish: [ka:l 'vIlhelm 2he:le]
By the time he was a teenager, Scheele had learned the dominant theory of gases which in the 1770s was the phlogiston theory. Phlogiston, classified as "matter of fire", was supposed to be released from any burning material, and when it was exhausted, combustion would stop. When Scheele discovered oxygen he called it "fire air" as it supported combustion. Scheele explained oxygen using phlogistical terms because he did not believe that his discovery disproved the phlogiston theory.  Before Scheele made his discovery of oxygen, he studied air. Air was thought to be an element that made up the environment in which chemical reactions took place but did not interfere with the reactions. Scheele's investigation of air enabled him to conclude that air was a mixture of "fire air" and "foul air;" in other words, a mixture of two gases. Scheele performed numerous experiments in which he heated substances such as saltpetre (potassium nitrate), manganese dioxide, heavy metal nitrates, silver carbonate and mercuric oxide. In all of these experiments, he isolated the same gas: his "fire air," which he believed combined with phlogiston in materials to be released during heat-releasing reactions.  However, his first publication, Chemische Abhandlung von der Luft und dem Feuer, was delivered to the printer Swederus in 1775, but not published until 1777, at which time both Joseph Priestley and Lavoisier had already published their experimental data and conclusions concerning oxygen and the phlogiston theory. The first English edition, Chemical Observation and Experiments on Air and Fire was published in 1780, with an introduction "Chemical Treatise on Air and Fire".

what did he do with this discovery?

Before Scheele made his discovery of oxygen, he studied air.



Answer the question at the end by quoting:

Usain St Leo Bolt  (; born 21 August 1986) is a retired Jamaican sprinter and world record holder in the 100 metres, 200 metres and 4 x 100 metres relay. His reign as Olympic Games champion in all of these events spans multiple Olympics. Due to his achievements and dominance in sprint competition, he is widely considered to be the greatest sprinter of all time.
Performing for Jamaica in his first Caribbean regional event, Bolt clocked a personal best time of 48.28 s in the 400 metres in the 2001 CARIFTA Games, winning a silver medal. The 200 m also yielded a silver, as Bolt finished in 21.81 s.  He made his first appearance on the world stage at the 2001 IAAF World Youth Championships in Debrecen, Hungary. Running in the 200 m event, he failed to qualify for the finals, but he still set a new personal best of 21.73 s. Bolt still did not take athletics or himself too seriously, however, and he took his mischievousness to new heights by hiding in the back of a van when he was supposed to be preparing for the 200 m finals at the CARIFTA Trials. He was detained by the police for his practical joke, and there was an outcry from the local community, which blamed coach McNeil for the incident. However, the controversy subsided, and both McNeil and Bolt went to the CARIFTA Games, where Bolt set championship records in the 200 m and 400 m with times of 21.12 s and 47.33 s, respectively. He continued to set records with 20.61 s and 47.12 s finishes at the Central American and Caribbean Junior Championships.  Bolt is one of only nine athletes (along with Valerie Adams, Veronica Campbell-Brown, Jacques Freitag, Yelena Isinbayeva, Jana Pittman, Dani Samuels, David Storl, and Kirani James) to win world championships at the youth, junior, and senior level of an athletic event. Former Prime Minister P. J. Patterson recognised Bolt's talent and arranged for him to move to Kingston, along with Jermaine Gonzales, so he could train with the Jamaica Amateur Athletic Association (JAAA) at the University of Technology, Jamaica.

Where did he run next?

He continued to set records with 20.61 s and 47.12 s finishes at the Central American and Caribbean Junior Championships.



Answer the question at the end by quoting:

Benjamin Solomon Carson Sr. (born September 18, 1951) is an American neurosurgeon, author and politician serving as the 17th and current United States Secretary of Housing and Urban Development since 2017, under the Trump Administration. Prior to his cabinet position, he was a candidate for President of the United States in the Republican primaries in 2016. Born in Detroit, Michigan, and a graduate of Yale University and the University of Michigan Medical School, Carson has authored numerous books on his medical career and political stances.
Carson was born in Detroit, Michigan, to Robert Solomon Carson, Jr. (1914-1992), a World War II U.S. Army veteran, and his wife, Sonya Carson (nee Copeland; 1928-2017). Robert Carson was a Baptist minister, but later a Cadillac automobile plant laborer. Both of his parents came from large families in rural Georgia, and they were living in rural Tennessee when they met and married. Carson's mother was 13 and his father was 28 when they married, and after his father finished his military service, they moved from Chattanooga, Tennessee to Detroit, where they lived in a large house in the Indian Village neighborhood. Carson's older brother, Curtis, was born in 1949, when his mother was 20. In 1950, Carson's parents purchased a new 733-square foot single-family detached home on Deacon Street in the Boynton neighborhood in southwest Detroit.  Carson's Detroit Public Schools education began in 1956 with kindergarten at the Fisher School, and continued through first, second, and the first half of third grade, during which time he was an average student. When Carson was five, his mother learned that his father had a prior family and had not divorced his first wife. In 1959, when Carson was eight, his parents separated and he moved with mother and brother to live for two years with his mother's Seventh-day Adventist older sister and her sister's husband in multi-family dwellings in the Dorchester and Roxbury neighborhoods of Boston. In Boston, Carson's mother attempted suicide, had several psychiatric hospitalizations for depression, and for the first time began working outside the home as a domestic worker, while Carson and his brother attended a two-classroom school at the Berea Seventh-day Adventist church where two teachers taught eight grades, and the vast majority of time was spent singing songs and playing games.  In 1961, when Carson was ten, he moved with his mother and brother back to southwest Detroit, where they lived in a multi-family dwelling in a primarily white neighborhood (Springwells Village) across the railroad tracks from the Delray neighborhood, while renting out their house on Deacon Street which his mother received in a divorce settlement. When they returned to Detroit public schools, Carson and his brother's academic performance initially lagged far behind their new classmates, having essentially lost a year of school by attending a Seventh-day Adventist church school in Boston, but both improved when their mother limited their time watching television and required them to read and write book reports on two library books per week. Carson attended the predominantly white Higgins Elementary School for fifth and sixth grades and the predominantly white Wilson Junior High School for seventh and the first half of eighth grade. In 1965, when Carson was 13, he moved with his mother and brother back to their house on Deacon Street. He attended the predominantly black Hunter Junior High School for the second half of eighth grade. When he was eight, Carson had dreamed of becoming a missionary doctor, but five years later he aspired to the lucrative lifestyles of psychiatrists portrayed on television, and his brother bought him a subscription to Psychology Today for his 13th birthday.

What happened then?
Carson's mother attempted suicide,