Donald James Leslie

Donald James Leslie was born on April 13, 1911. He created and manufactured the Leslie speaker that refined the sound of the Hammond organ and helped popularize electronic music. He died on September 2, 2004.

First human spaceflight launched

The first human spaceflight was launched by the Soviet Union on April 12,1961 as a part of the Vostok program , with Cosmonaut Yuri Gagarin aboard.

International Labour Organization established

The International Labour Organization (ILO) was created by the 1919 Peace Conference that followed World War I. Its original constitution, which formed part of the Treaty of Versailles, established it on 11 April 1919 as an autonomous organization associated with the League of Nations.

Arnold Orville Beckman

 

Arnold Orville Beckman was born on April 10, 1900. He was an American chemist who invented a pH meter (1934) for measuring acidity and alkalinity and the quartz spectrophotometer, an instrument which pioneered automatic chemical analysis. He died on May 18, 2004.

Constitution of Pakistan created

The Constitution of the Islamic Republic of Pakistan is the supreme law of the State of Pakistan. Drafted by the government of Zulfikar Ali Bhutto, with an additionally assistance from the country's opposition parties, it was approved by the legislative assembly on April 10 and ratified on 14 August 1973.

Facebook purchases Instagram

Facebook purchases Instagram, a photo sharing application, for $1 billion April 9,2012.

Boeing 737 - First flight

The Boeing 737 made its first flight on April 9, 1967. It is a short- to medium-range twin-engine narrow-body jet airliner. Originally developed as a shorter, lower-cost twin-engine airliner derived from Boeing's707 and 727, the 737 has developed into a family of nine passenger models with a capacity of 85 to 215 passengers.

 

First female Prime Minister of Britain passed away

Margaret Hilda Thatcher, Baroness Thatcher, the first woman to become British prime minister, has died at the age of 87 on April 8,2013. She was a British politician, the longest-serving (1979–1990) Prime Minister of UK of the 20th century, and the only woman ever to have held the post and she was called the "Iron Lady" for her personal and political toughness.. She was born on 13 October 1925. 

Discovery Island opened & closed

Discovery Island is an 11.5 acres island  in Bay Lake at Walt Disney World in Bay Lake, Florida .

The island opened as Treasure Island on April 8, 1974, as a place to observe wildlife, and was later renamed Discovery Island when it was recognized as a zoological park. It closed to the public on April 8, 1999, but continued to operate until July 9, 1999.

World Health Organization established

World Health Organization (WHO) is a specialized agency of the UN that is concerned with international public health. It was established on 7 April 1948, with headquarters in Geneva , Switzerland, and is a member of the United Nations Development Group.

World Health Day

World Health Day is celebrated on 7 April to mark the anniversary of the founding of WHO in 1948. Each year a theme is selected for World Health Day that highlights a priority area of public health concern in the world. The theme for 2013 is high blood pressure

A solo voyage round the world.

Indian Navy officer Lt Commander Abhilash Tomy, The first Indian who embarked on a non-stop solo circumnavigation of the globe on a sail boat. He completes his voyage on April 6,2013.
He was the first Indian and the second Asian after Japanese Minoru Saito to attain the feat.

 

 

1st Modern Olympic games officially opens in Athens

The 1896 Summer Olympics, officially known as the Games of the I Olympiad, was a multi-spot event  held in Athens, Greece, from April 6 to 15, 1896. It was the first international Olympic Games held in the Modern era.

National Maritime Day of India

National Maritime Day of India falls on April 5. First celebrated on 5th April, 1964, the day marks the journey of SS Loyalty, the first ship of the Scindia Steam Navigation Company, to the United Kingdom.

The first successful artificial heart implant

On April 4, 1969, Dr. Denton Cooley, a Houston heart surgeon, performed the first successful artificial heart implant on a human patient. The artificial heart was actually developed by Cooley's cross-town rival and former colleague, Dr. Michael DeBakey, and his team. Cooley's implant operation turned the rivalry with DeBakey into a full-fledged feud that lasted for the next 40 years. DeBakey considered it a betrayal and a theft of his technology.

Father of British Neurology

John Hughlings Jackson who is known as the father of British neurology was born April 4, 1835, who studies of epilepsy, speech defects, and nervous-system disorders arising from injury to the brain and spinal cord helped to define modern neurology. He died Oct. 7, 1911.

Luna 10 orbits Moon

The Luna 10 spacecraft was launched towards the Moon from an Earth orbiting platform on March 31, 1966. The spacecraft entered lunar orbit on April 3, 1966 and completed its first orbit 3 hours later.

John Paul II dies

John Paul II sometimes called Blessed John Paul or John Paul the Great, born 18 May 1920 and died 2 April 2005, reigned as Pope of the Roman Catholic Church from 1978 until his death in 2005. He was the second longest serving Pope in history and the first non Italian since 1523.

April Fools' Day

April Fools' Day is celebrated in many countries on April 1 every year. Sometimes referred to as All Fools' Day, it is widely recognized and celebrated as a day when people play practical jokes and hoaxes on each other.

Gmail was launched

Gmail is a free, advertising-supported email service provided by Google. Users may access Gmail as secure webmail, as well as via POP3 or IMAP4 protocols. Gmail was launched as an invitation-only beta release on April 1, 2004 and it became available to the general public on February 7, 2007.