TELEVISION

John Logie Baird was Scottish. He invented tv. He was an enigineer and entrepreneur. He archieved his first transmission in 1924. On March 25th, 1925 , Logie held his first public demostration of tv at the London department store.

Alessandro Volta

He was born in 1745 and he died in 1827.

He was an Italian physicist, known for his work on electricity. He was born in Como and was educated there in a public school. In 1774 he was professor of physics at the Royal School of Como, and the following year invented an instrument that produced electrical charges. During 1776 and 1777 he was devoted to chemistry, atmospheric electricity and other experiments such as the ignition of gases by an electric spark in a closed container.

In 1779 he was professor of physics at the University of Pavia, a chair he occupied for 25 years. By 1800 he had developed the so-called voltaic pile, the forerunner of the electric battery, which produced a steady flow of electricity. For his work in the field of electricity, Napoleon made him a count in 1801. The electrical unit known as the volt was named in his honor

Nobel

He was born in 1833 and he died in 1896 . A Chemist, an inventor and philanthropist born in Stockholm, Sweden. After receiving a formal education in St. Petersburg (Russia) and the United States, where he studied mechanical engineering, he returned to St. Petersburg to work with his father, producing mines, torpedoes and other explosives. In a family factory in Heleneborg (Sweden), aimed to develop a safe method of handling nitroglycerin after an explosion in 1864 killed his younger brother, and four other people. In 1867 Nobel achieved his goal: to reduce the volatility of nitroglycerine and mixed it with an absorbent and porous material produced what he called dynamite. He established the ballistite, an early smokeless powders. When he died, ran factories for the manufacture of explosives in various parts of the world. In his will he bequeathed the bulk of his fortune (estimated at about $ 9 million) to create a foundation to establish annual prizes for the merits achieved in physics, chemistry, medicine and physiology, literature and world peace. The economics prize was awarded from 1969

ALEXANDER FLEMING

Alexander Fleming (August 6, 1881 - March 11, 1955) was a Scottish scientist famous for discovering antimicrobial enzyme called lysozyme and antibiotic penicillin obtained from the fungus Penicillium chrysogenum.

Fleming was born in Ayrshire, Scotland and died in London, England, at age 74. He worked as a medical microbiologist at St. Mary's Hospital in London until the beginning of the First World War. In this hospital he worked at the Department of inoculations dedicated to improving and producing vaccines and serums. Almorth Edward Wright, secretary of the Department, was of interest to Fleming for new treatments for infections.

During the war was a military doctor in the fronts in France and was impressed by the high mortality caused by shrapnel wounds infected (eg gas gangrene) in hospitals. After the war, he returned to St. Mary Hospital where he sought a new antiseptic strongly avoided the harsh agony caused by infected wounds.

Arquimedes

Greek mathematician. The son of an astronomer, who probably introduced him to mathematics, Archimedes studied in Alexandria, where his teacher Conon of Samos and Eratosthenes came into contact with, the latter dedicated his Method Archimedes, which exhibited his brilliant application of the mechanical geometry, in which "weighed" imaginary unknown areas and volumes to determine its value. Then returned to Syracuse, where he devoted himself to scientific work.
The idea of Archimedes is reflected in one of the original proposals of his work On Floating Bodies, pioneer of hydrostatics; for the famous principle that bears his name, as there explained, making use of it is possible to calculate the law an alloy, which enabled him to discover that the goldsmith had committed fraud

Robert Oppenheimer

He was born twenty-second of April 1904. He was a phisycal U.S. During the Second World War he wanted to develop the first nuclear weapon. Oppenheimer expressed his feelings for killing innocent people in Hiroshima and Nagasaki. He was the director in the Manhatan project.Ten years leter the presient gave .....

Leonardo da Vinci

Leonardo da Vinci (15th April 1452, 2nd May 1519) was an Italian polymath: painter, sculptor, architect, mathematician, inventor, botanist, writer...
Leonardo has often been described as the archetype of the Renaissance man, a man whose unquenchable curiosity was equaled only be his powers of invention.
He is widely considered to be one of the greatest painters of all time and perhaps the most diversely talented person ever to had lived.
Universal genius, besides humanist philosopher whose infinite curiosity only can be comparable to his inventive capacity, Leonardo da Vinci is considered to be one of the biggest painters of all the times and, probably, he is the person with the major number of talents in multiple disciplines that it has never existed.

Anders Celsius

He was born in 1701 and he deat in 1744. He was a Swedish astronomer, he was the first who proposed the centigrade thermometer, which has a scale of 100 degrees that separate the boiling and freezing water. From 1730-1744 he was professor of astronomy at the University of Uppsala, built the observatory in this city in 1740, and was appointed its director. In 1733 he published his collection of 316 observations on the aurora borealis and in 1737 was part of the French expedition organized to measure a degree of latitude in the polar regions.

´THE TELEPHONE

For a long time Alexander Graham Bell was considered the inventor of the telephone, with Elisabeth Gray. But Bell wasn't the inventor of this appliance, but only the first to patent it. This happened in 1876. On June 11,2002 the U.S.A. congress resolution approsed 269, by that it recognized that the inventor of the telephone had been Antonio Meucci that called it teletrófone.

Galileo Galilei

Galileo Galilei was born in Pisa on fifteenth of Frebuary in 1564.
He was the eldest son of seven children.
In 1581 he invented the pendulum and made the laws of governing their movements.
In 1583 Galileo studied Maths.
In May 1609 Galileo recived a letter from Paris corfirming a persistent rumor: the existence of a telescope that can see distant objects.With this single description, Galileo built his first telescope.