Fahrenheit & Celsius (#57/#56)

Fahrenheit

Daniel Gabriel Fahrenheit was born on May 24, 1686 in Danzig in the Polish-Lithuanian Commonwealth. Fahrenheit came from a family of merchants, but in 1701, both of Fahrenheit's parents died from eating poisonous mushrooms. After this, Fahrenheit moved to Amsterdam to begin training to become a merchant himself.

While in Amsterdam, Fahrenheit became interested in natural science and began studying and experimenting in the field. Fahrenheit also began to travel throughout Northern and Central Europe. While travelling, Fahrenheit met many notable members of the scientific and Enlightenment communities, including Gottfried Leibniz, co-developer of infinitesimal calculus, and Ole Romer, who made the first quantitative measurements of the speed of light.

In 1717, Fahrenheit settled in The Hague as a glassblower who specialized in making barometers, altimeters, and thermometers. Fahrenheit also lectured in chemistry in Amsterdam. In 1724, Fahrenheit created a scale to record temperature based on three points. These three points were the lowest point on the thermometer, or 0 Fahrenheit (F), the freezing point of water, or 32 F, and body temperature, which he calculated to be 96 F. The system was later changed so that the difference between the freezing and boiling points of water was exactly 180 F. 

Celsius

Anders Celsius was born on November 27, 1701 in Uppsala, Sweden. Unlike Fahrenheit, Celsius came from a family of scientists. Celsius's father and maternal grandfather were astronomers, and Celsius's paternal grandfather was a mathematician. Celsius studied at the Uppsala University and in 1730, Celsius became a professor there.

Celsius published many works in several fields of study. In one study conducted, he was the first to suggest that there was a connection between the appearance of the aurora borealis and changes in the magnetic field of the Earth, which was later proved to be correct. He also was part of the 1736 expedition to Lapland to measure the length of a degree along the meridian. This expedition, when compared to similar measurements from Peru, proved Isaac Newton's theory that the Earth was ellipsoid, rather than completely round, and flattened at the poles. Celsius was also one of the first people to measure the magnitude, or brightness, of certain stars, and, even with the equipment he used, Celsius was quite accurate.

Celsius is most famous for his creation of the temperature system that was named after him. Celsius understood that the boiling point of liquids was not simply dependent on heat but on pressure as well, so using a standard pressure (the pressure at sea-level), Celsius created a thermometer. At the standard pressure, the thermometer would read 100 Celsius (C) at water's melting point and 0 C at its boiling point. A year after his death, the system was reversed so the 0 C would be freezing and 100 C would be boiling.

The End

Fahrenheit died in The Hague on September 16, 1736 and is buried there at Cloister Church. Celsius died on April 25, 1744 of tuberculosis soon after co-founding the Royal Swedish Academy of Sciences. Fahrenheit's system of temperature measurement was widely accepted throughout the world and is still used by the general population of the United States, Belize, and in parts of the United Kingdom and Canada. Celsius's system, when published, replaced Fahrenheit's system in all but the above stated regions. The Celsius system has also become the standard measurement system for the majority of scientific studies, and the Kelvin System is based off of that of Celsius. Fahrenheit and Celsius are on our list because they create the first systems to measure temperature without just say "It's cold." or "It's hot."

Jack the Ripper (#62, August 31st)

Background

In the mid-1800s, many immigrants were flooding into London, mainly into London's East End. Irish immigrants were coming from the West, and Jewish Immigrants were coming from the East. The sudden jump in population led to worsening of conditions in London. On April 3rd, 1888, the first of eleven "Whitechapel Murders" took place in London's East End.

Murders

During the investigation process of these eleven murders, at least five are assumed to have been committed by the same person, who became known as Jack the Ripper. On August 31st, 1888, the body of Mary Ann Nichols was found, with her throat cut and her abdomen ripped open. From that date to November 9th, 1888, there were four more murders, each similar to the one described above. Each murder victim was a poor women, and each body was mutilated, some even having organs missing. 

As the police investigated the Whitechapel murders, it was assumed that the Ripper was a man who lived in London and worked during the week. This was assumed because the Ripper struck around a certain area of town each time, yet only struck during the weekend. The police first investigated surgeons, butchers, other workers who handled knives, believing that people of these occupations were more likely to kill victims by cutting them with knives. Unfortunately, all the main suspects had alibis that checked out.

There were hundreds of letters sent to the police and the newspapers whose authors claimed to be Jack the Ripper. In the letter known as the "Dear Boss" letter, the author became the first to use the name Jack the Ripper, which became a world famous name. In another letter, known as the "From Hell" letter, the author sent half a kidney, which the author claimed was the kidney of Catherine Eddowes, who had had her kidney stolen during her murder by the Ripper. The author also claimed that he had cooked and eaten the other half of the kidney. Though most letters were immediately thrown out as hoaxes, the "From Hell" letter was kept, though it was never discovered whether the kidney was indeed Eddowes's.

As the murder investigation progressed, the media caught onto the story. Tax reforms had made printing newspapers much cheaper than before, and Jack the Ripper's story was one of the first to be widely distributed throughout the city and the country. 

The End

The true identity of Jack the Ripper was never discovered, though policemen investigated the murders until 1931. Jack the Ripper became a legend, a fairy tale to scare children into being good. The Ripper's appearance also helped to bring media attention to the poor living conditions of London's East End. Jack the Ripper is on our list for being one of the few people who remain famous (or infamous) without actually having a face to put with their name.

The Nazi-Soviet Non-Aggression Pact (August 23rd)

In 1939, Adolf Hitler was preparing Germany for war. Hitler's first target was Poland. Unfortunately, Poland was protected by both France and Britain, and if the two powers of Western Europe entered the war, the Soviet Union, the major power of the East, might also enter the war. In World War I, Germany had also learned the consequences of fighting a two-front war, so Hitler sought to keep the U.S.S.R. from fighting.

On August 14, 1939, Joachim von Ribbentrop and Vyaaheslav Molotov, the Foreighn Ministers of Germany and the U.S.S.R., respectively, met in Moscow to arrange the Nazi-Soviet Non-Aggression Pact.

Publicly, the Nazi-Soviet Non-Aggression Pact was an agreement that Germany and Germany would not attack each other, but Ribbentrop and Molotov also included a secret protocol to the pact.

In the secret protocol, the Soviet Union would not attack when Germany invaded Poland, and in return, Germany would give the Baltic States and part of Poland to the Soviet Union. Even after World War II ended, the very existence of the protocol was denied by the Soviet Union until 1989.

On September 1, 1939, Nazi Germany attacked Poland, and the Soviet Union did nothing. Britain declared war on Germany two days later. The Non-Aggression Pact allowed Hitler to take Poland and fight the France and Britain without Stalin's intervention. The pact stayed in effect until June 22, 1941, when Hitler made a surprise attack on the Soviet Union, bringing Stalin into World War II.

Nicolaus Copernicus (#115)

Young Life and College

Nicolaus Copernicus was born on February 19, 1473 in Poland from two merchant families. He was the youngest of four children. At first, while being supported by his uncle, Copernicus studied at the University of Krakow in 1491, where he attained the mathematical and astronomical skill for his later achievements. He also was able to study the natural-science writings of Aristotle and Averroes while studying in Krakow.  In 1495, Copernicus left Krakow because of his uncle Watzenrode wanted him to study law in Italy, hoping for Copernicus to join the Warmia canonry, which Watzenrode was the Prince-Bishop of. In 1497, Copernicus registered in the Bologna University of Jurists. In Bologna, Copernicus studied law, the humanities, and astronomy. He became the assistant of astronomer Domenci Maria Novara da Ferrara. Under Ferrara, he began to find peculiarities in Ptolemy's geocentric universe theory based on observations of the star Aldebaran. Copernicus moved to Rome in 1500, where he continued his astronomical studies. Copernicus also went to the University of Padua, where he studied medicine, which include astrology. Over his education, Copernicus learned Latin, Greek, German, and Italian along with his native Polish.

Work

Copernicus, after his studies, became his uncle's secretary and physician in Heilsberg. He took part in almost all of his uncles political, administrative, and economic activities. This is where Copernicus began work on his heliocentric theory. Copernicus also made trips on business from his uncle. In 1510, Copernicus ended work for his uncle, and worked as a translator of Greek and Latin texts. In 1514, the first outline of the heliocentric world was written. Throughout his life, Copernicus worked as a assistant to politicians and religious leaders while continuing to study astronomy. By 1532, his manuscript on heliocentrism was basically complete, but he resisted publishing due to fears of scorn. His book, De revolutionibus orbium coelestium, was published under Georg Rheticus, who had published other works of Copernicus. Along with Andreas Osiander, Rheticus worked to have the book published in 1542.

The End

Legend has it that the first copy of De revolutionibus ever printed was placed in Copernicus's hand on May 24, 1543, the day that Copernicus died. Copernicus makes our list for being one of the few people in the world who changed the world's mind. Before him, the common theory was that everything orbited the Earth. Copernicus proved them all wrong. He changed the way people looked at the world, and not many people can do that.