william harvey

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harvey
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william harvey was born in england.He was an english medical doctor.He discovered the the properties of the blood being pumped around the body by the heart.He proposed that blood flowed through the heart in two separate closed loops. One loop, pulmonary circulation ,connected the circulatory system to the lungs. The second loop,systemic circulation causes blood to flow to the vital organs and body tissue. He also observed that blood in veins would move readily towards the heart, but veins would not allow flow in the opposite direction.
Harvey also conducted research in embryology in his later career,and wrote On the Generation of Animals in 1651. He supported the aristotelien theory of epigenesis that embryos formed gradually and did not possess the characteristics of an adult in early stages

 

Fidel Castro

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fidel
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Fidel Castro was born on August 13, 1926, near Biran, Cuba.He is a Cuban,revolutionist,prime minister (1959 ), and president (1976 ).He showed an interested in history and military matters growing up. Castro studied law in Havana and became involved with a revolutionary group at the university.In 1953 Castro was imprisoned after an unsuccessful rising against Cuban dictator Fulgencio Batista.He was later released under an amnesty.Castro returned to Cuba in 1956 by boat and in 1958 he mounted a full-scale attack and Batista fled the country in January 1959.Castro took power in early 1959. As prime minister he set about far-reaching reforms.Castro changed Cuba into the first communist nation in the Western Hemisphere and aligned himself with the Soviet Union.Castro has led the country for more than four decades. He has been credited with making some improvements in education and healthcare, but the Cuban people still face food shortages, economic hardship, and little personal freedom. A strict ruler, Castro has been known for quieting anyone who criticizes his government and has imprisoned or killed numerous opponents.

 

Shakuntala Devi

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shaku
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Shakuntala Devi is an indian mathematician who was born in 1939 in Bangalore, Karnataka .she is generally known as 'human calculator (or) human computer' because of her extraordinary talents in solving complex mathematical problems without any mechanical aid .she became an expert in complex mental arithmetic at the age of five.In 1977, she extracted the 23rd root of a 201-digit number mentally.On 18 June 1980, Shakuntala Devi gave the product of two, thirteen digit figures after multiplying them within 28 seconds.She also found her place in the Guinness book of records as a result of her extraordinary talents. Nowadays, apart from solving mathematical problems, she is utilising her amazing talent in the field of astrology.